1 00:00:00,300 --> 00:00:29,079 So we are recording. So there are four exercises to correct. Okay. And these exercises are here. This is the first one. This block is turning. We can stop it if we click on it. I will click on it. And the moment I have clicked on it, the block has stopped turning. If I click again on it, I can rotate it. I can make it rotate it by myself. Just clicking and dragging. 2 00:00:29,079 --> 00:00:31,539 this object is the same than this one 3 00:00:31,539 --> 00:00:38,840 the front view will be the pink one 4 00:00:38,840 --> 00:00:41,899 I think in the instructions I gave to you it was wrong 5 00:00:41,899 --> 00:00:45,920 I think I said that the blue one is the front view 6 00:00:45,920 --> 00:00:47,780 it's not a big problem, ok? 7 00:00:50,119 --> 00:00:51,659 no, anyway, I'm sorry, I'm sorry 8 00:00:51,659 --> 00:00:56,020 yes, we are going to consider that this one is the front view 9 00:00:56,020 --> 00:00:57,340 the blue is the front view, I'm sorry 10 00:00:57,340 --> 00:01:00,399 I was right the first one 11 00:01:00,399 --> 00:01:05,739 The blue one is the front view, because there are several possibilities. 12 00:01:05,739 --> 00:01:09,599 I can consider that this one is the front view, or I can consider that this one is the front view. 13 00:01:10,579 --> 00:01:17,079 But don't worry, we will talk about the different possibilities later in the future, when we are back in the classroom. 14 00:01:17,379 --> 00:01:21,099 But for the moment, I will consider that the blue one is the front view. 15 00:01:21,900 --> 00:01:28,060 So, if I look at the object from the front view, I will be able to see something like that. 16 00:01:28,180 --> 00:01:28,579 Do you agree? 17 00:01:28,579 --> 00:01:34,959 if I rotate the object I will be able to see the object this way so the front 18 00:01:34,959 --> 00:01:43,700 view will be a kind of L I will draw the front view here using this pencil I can 19 00:01:43,700 --> 00:02:01,290 draw it and you see that I'm drawing it so this is the front view now if I move 20 00:02:01,290 --> 00:02:10,349 to the right no I made a mistake I made a mistake don't worry the front view 21 00:02:10,349 --> 00:02:18,250 okay the front view is not this one because I will change my my criteria I 22 00:02:18,250 --> 00:02:22,550 will think I will consider that this is the front view the blue one okay the 23 00:02:22,550 --> 00:02:28,509 pink one I mean why because the left view will be drawn on the right it's a 24 00:02:28,509 --> 00:02:32,949 common mistake usually to avoid this mistake you will find an arrow against 25 00:02:32,949 --> 00:02:39,409 an arrow flecha pointing the front view here there is no arrow but from this moment we know 26 00:02:39,409 --> 00:02:48,439 that in this web page the front view is the pink one so if this is the front view my front view 27 00:02:48,439 --> 00:02:56,139 will be something like that there will be two pieces of flat surfaces so my front view will be 28 00:02:56,139 --> 00:03:08,090 this one i will try it again i think you will agree with this drawing anyway if you have 29 00:03:08,090 --> 00:03:17,530 questions you will be able to ask later so this is the front view okay to draw the left side view 30 00:03:17,530 --> 00:03:25,180 we will rotate the object this way and the left side view will be the one i was drawing before 31 00:03:25,180 --> 00:03:31,759 the left side view is drawn on the right you don't know why for the moment well we will talk about it 32 00:03:31,759 --> 00:03:39,060 later in the future okay so for the moment don't worry front view here left side view here on the 33 00:03:39,060 --> 00:03:42,659 right. I repeat, this is the front view, this is the left side view. 34 00:03:43,319 --> 00:03:47,139 This web page is really useful because I can rotate the object. And the top view 35 00:03:47,139 --> 00:03:51,139 will be this one. Can you see? I'm rotating the object, I'm 36 00:03:51,139 --> 00:03:55,020 looking at the object from above, so the top view will be something 37 00:03:55,020 --> 00:04:08,710 like that. I will draw. So, this is the correction 38 00:04:08,710 --> 00:04:13,009 for the first exercise. Front view here, left 39 00:04:13,009 --> 00:04:15,969 side view here on the right, top view here at the bottom. 40 00:04:15,969 --> 00:04:21,970 I repeat, in the future we will understand why these are the correct positions for everyone. 41 00:04:21,970 --> 00:04:24,970 So, this is the correction for the first exercise. 42 00:04:24,970 --> 00:04:31,279 Now, I will move on. I will start with the correction of the second one. 43 00:04:31,279 --> 00:04:35,279 So, this is the second object. 44 00:04:35,279 --> 00:04:43,279 Again, the object is rotating, just to avoid us to have a full view of it. 45 00:04:43,279 --> 00:04:47,279 Anyway, if I click on it, I can stop it and again I will start. 46 00:04:47,279 --> 00:04:52,279 If I'm looking at the object from this position, can you see the arrow of my pointer? 47 00:04:52,279 --> 00:04:56,279 This is the front view. And what will I be able to see from the front view? 48 00:04:56,279 --> 00:05:01,779 Something like that. So, my front view will be something like that. 49 00:05:01,779 --> 00:05:06,779 There are two different surfaces, so my front view has two squares. 50 00:05:06,779 --> 00:05:15,660 Well, not two squares, two pieces of surfaces. 51 00:05:15,660 --> 00:05:22,779 this is the front view side view to look at the side view i will rotate the object this way 52 00:05:23,740 --> 00:05:30,459 i will be able i will be able to look at the object from this position so this is my 53 00:05:31,740 --> 00:05:37,579 side view i will be able to see something like that i there is only one surface 54 00:05:37,579 --> 00:05:48,829 way so that's why I will only draw a single surface there are no lines in the 55 00:05:48,829 --> 00:05:56,310 middle so this is the left side view and the left side view is drawn on the right 56 00:05:56,310 --> 00:06:02,189 I go back to the original position this is the front view this is the side view 57 00:06:02,189 --> 00:06:07,649 and to be able to look at the object from above I will rotate the object this 58 00:06:07,649 --> 00:06:16,110 way and this one will be the top view this surface and this one so this one 59 00:06:16,110 --> 00:06:23,129 will be the top view when we draw the front left and top view we don't try to 60 00:06:23,129 --> 00:06:30,449 draw perspectives we don't have to fraud front I mean side and top view are flat 61 00:06:30,449 --> 00:06:38,689 surfaces so this is the top view of the object okay fine perfect you agree okay 62 00:06:38,689 --> 00:06:42,990 later you will be able to ask questions let's move on this is the correction of 63 00:06:42,990 --> 00:06:48,029 the second exercise I will move I will move on and I we will start with the 64 00:06:48,029 --> 00:06:54,449 third one click on it and this is the third object a little bit more 65 00:06:54,449 --> 00:06:59,730 complicated but just a little bit an easy one it's rotating I will stop it 66 00:06:59,730 --> 00:07:03,829 the rotation, and now I have the same object here than here. Front view. 67 00:07:04,829 --> 00:07:06,589 The front view is the one that 68 00:07:06,589 --> 00:07:11,730 I will look at the object from this position, the one that is pointing 69 00:07:11,730 --> 00:07:15,850 the arrow. So, to draw the front view, I will rotate 70 00:07:15,850 --> 00:07:19,670 the object this way, and I will have three different 71 00:07:19,670 --> 00:07:23,750 surfaces. This one, this one, and this one. So, that's why I will draw 72 00:07:23,750 --> 00:07:30,649 the front view this way. This part is this one, 73 00:07:30,649 --> 00:07:34,149 the second part, the one on the 74 00:07:34,149 --> 00:07:38,529 right top, top right is here 75 00:07:38,529 --> 00:07:44,500 this is the top right part and now 76 00:07:44,500 --> 00:07:54,959 third part is the one at the bottom, so this is the front 77 00:07:54,959 --> 00:08:00,699 view, ok? this is the object and I look at the object from 78 00:08:00,699 --> 00:08:03,920 this position, the front view will be this one 79 00:08:03,920 --> 00:08:08,800 now, I will draw the left side view, I will draw 80 00:08:08,800 --> 00:08:16,399 on the right so I will rotate the object this way and I will be able to see two surfaces this one 81 00:08:16,959 --> 00:08:23,839 a kind of L and this kind of triangle two different surfaces I draw it this way this 82 00:08:23,839 --> 00:08:43,120 is the kind of L so this one is this one and now the triangle here so this is the left side view 83 00:08:43,120 --> 00:08:51,039 that has been drawn on there right and now if this is the front and this is the side view 84 00:08:51,039 --> 00:08:56,559 the two view will be looking at the object from above and this one will be the top view again 85 00:08:57,279 --> 00:09:03,759 three surfaces this one this one and this one and i will draw them this way 86 00:09:15,460 --> 00:09:21,460 this one is this one this one is this one and now what i'm going to draw this one 87 00:09:21,460 --> 00:09:34,289 And I repeat, here I don't try to draw kind of perspective, because the views of an object are flat surfaces, okay? 88 00:09:34,289 --> 00:09:43,769 We consider that we are far enough from the object to be able, I mean, to see the different surfaces like flat surfaces, okay? 89 00:09:44,570 --> 00:09:50,830 So, these are the front view, the left side view, and the top view of the object, okay? 90 00:09:50,990 --> 00:09:54,269 So, this is the correction for the third exercise. 91 00:09:54,370 --> 00:10:00,429 and now I will move on and I will do the fourth one and this is the fourth one 92 00:10:00,429 --> 00:10:06,909 again is rotating to allow us to have a full view of the object I will stop it 93 00:10:06,909 --> 00:10:13,929 and again this is the front view the one I when I'm looking at the object from 94 00:10:13,929 --> 00:10:19,570 the position of the arrow I will be able to see the front view the pink one so I 95 00:10:19,570 --> 00:10:26,809 rotate the object this way then I will draw it. There are two surfaces this one 96 00:10:26,809 --> 00:10:36,759 and this one so the smaller one is here top left here here is the surface is 97 00:10:36,759 --> 00:10:47,779 this one and now the kind of L will be this one okay so this is the front view 98 00:10:47,779 --> 00:10:55,159 the L here and this part here now I will draw the left side view I will rotate 99 00:10:55,159 --> 00:10:58,899 the object, I mean the left side view, when we are looking at the object from the left 100 00:10:58,899 --> 00:11:03,379 we are looking at the object from this position, the one of my pointer 101 00:11:03,379 --> 00:11:07,379 and it means that we will be able to see something like that 102 00:11:07,379 --> 00:11:11,080 there will be two surfaces, this one, kind of L again 103 00:11:11,080 --> 00:11:20,409 and this square, so I will draw them, it looks like the 104 00:11:20,409 --> 00:11:23,909 front view, but it's not the same one, because the position of the 105 00:11:23,909 --> 00:11:28,450 smaller square is different, the smaller square here 106 00:11:28,450 --> 00:11:32,590 is on the top left, it's not on the top, I mean, here now is on the 107 00:11:32,590 --> 00:11:36,149 top right, not on the top left like before. And the L, 108 00:11:36,970 --> 00:11:40,529 the shape of the L, is not exactly the same. They look similar, but 109 00:11:40,529 --> 00:11:44,330 they are not exactly the same. The top, I mean, the front view, 110 00:11:44,490 --> 00:11:48,409 the pink one, and the side view, the blue one. And now, if this 111 00:11:48,409 --> 00:11:52,450 is the front view, and this is the side view, the top view 112 00:11:52,450 --> 00:11:56,470 will be something like that. I can rotate the object this way, and 113 00:11:56,470 --> 00:12:00,549 I will be able to look at the object from above. There will be 114 00:12:00,549 --> 00:12:04,470 two surfaces. This one, kind of L, and again, the smaller 115 00:12:04,470 --> 00:12:08,490 square. So I will draw the first one, the smaller 116 00:12:08,490 --> 00:12:17,149 square. The three views of this object, they look similar 117 00:12:17,149 --> 00:12:21,169 but they are different. Because of the position of the small square is 118 00:12:21,169 --> 00:12:24,389 different. Now the smaller square is on the bottom left. 119 00:12:25,929 --> 00:12:29,350 So these are the front view, 120 00:12:29,350 --> 00:12:37,350 left side view and top view of my object, ok? So these are the corrections of the exercises I sent to you. 121 00:12:37,350 --> 00:12:51,179 Ok, let's correct this fifth exercise. Again, we have the object, the 3D object, and we will consider that this one is the front view. 122 00:12:51,179 --> 00:12:56,179 When we are looking at the object from this position, this is the front view, ok? 123 00:12:56,179 --> 00:13:05,179 So, front view here. I will rotate the object this way and I will draw the front view here, on this part. 124 00:13:05,179 --> 00:13:10,179 There are three surfaces. This one, this one and this one. 125 00:13:10,179 --> 00:13:19,179 I will consider that there are three flat surfaces because I'm far enough to see them like flat surfaces. 126 00:13:19,179 --> 00:13:25,179 I will start drawing them. The one on the top left, the one on the top right and the long one on the bottom. 127 00:13:26,179 --> 00:13:50,690 This square, this square, this square. This one is this one. Now, this one. The one on the top right. And now the one on the bottom. So, this is the front view. 128 00:13:50,690 --> 00:14:00,690 I go back to the original perspective, the original view, the one with the three perspectives, and now I will draw the side view. 129 00:14:00,690 --> 00:14:17,690 There are two different flat surfaces. This one, the one with, I mean, this is a kind of L, and this one that is a kind of triangle, but different from the triangles we saw before, some minutes ago. 130 00:14:17,690 --> 00:14:28,110 now I'm going to draw the kind of L this way and now I'm going to draw the 131 00:14:28,110 --> 00:14:32,409 triangle from this position to the middle of this one this is the side view 132 00:14:32,409 --> 00:14:37,730 do you agree and now I go back to the original position I move to the front 133 00:14:37,730 --> 00:14:44,590 and I will rotate I will fly from this position there are three flat surfaces 134 00:14:44,590 --> 00:14:48,250 this one, this one and this one, I will start with the top left 135 00:14:48,250 --> 00:14:54,000 this square, now 136 00:14:54,000 --> 00:14:58,100 the bottom left square, this one, this one here 137 00:14:58,100 --> 00:15:04,419 and now the surface on the right, this one, the long one 138 00:15:04,419 --> 00:15:11,879 so these are the three views of my object 139 00:15:11,879 --> 00:15:14,720 front, side and top, ok? 140 00:15:16,259 --> 00:15:19,679 so, let's correct the sixth object 141 00:15:19,679 --> 00:15:23,860 again, we are going to consider that this one is the front view, if we are locking up the object 142 00:15:23,860 --> 00:15:28,000 from this position, the one that I'm showing with the arrow, so if I'm looking at the 143 00:15:28,000 --> 00:15:32,059 object from this position, the front view will be something like 144 00:15:32,059 --> 00:15:35,080 that, we have a 145 00:15:35,080 --> 00:15:40,000 top left square here, a top right square here, and a 146 00:15:40,000 --> 00:15:43,720 bottom rectangle here, so I will draw the three of them 147 00:15:43,720 --> 00:15:51,970 this one is this one, now this one will be 148 00:15:51,970 --> 00:15:57,789 this one, and the one on the bottom will be 149 00:15:57,789 --> 00:16:05,230 this one, so this is the front view, I go back to the 150 00:16:05,230 --> 00:16:09,009 original position, the one with the perspective, and now I will rotate 151 00:16:09,009 --> 00:16:12,570 to look at the object from this position, the one I'm pointing with the arrow 152 00:16:12,570 --> 00:16:17,250 so this one will be the left side view 153 00:16:17,250 --> 00:16:21,379 that is drawn on the right, I will start here 154 00:16:21,379 --> 00:16:29,110 here, here, here, and now 155 00:16:29,110 --> 00:16:35,029 this is the this is the first surface the bigger one and now i'm going to draw the smaller one 156 00:16:39,019 --> 00:16:44,539 this is the smaller one okay this is the left side view that is drawn on the right and now 157 00:16:45,179 --> 00:16:52,539 i go back to the original position i move to the front and now i will rotate this way so 158 00:16:52,539 --> 00:16:59,340 this is the top view there are three surfaces the this is the top right square i will draw it 159 00:16:59,340 --> 00:17:24,559 This is the bottom, I mean, yes, the bottom right square, I will draw it, and now the left rectangle, and these are the three views of the object, ok?