1
00:00:00,000 --> 00:00:09,980
Okay, so now we are going to draw a straight line tangent to the circumference, but instead of having a point, okay, we have a direction, okay?

2
00:00:10,019 --> 00:00:18,379
We want to draw a tangent line here, okay, following this direction, or also here, okay? We're going to draw it also there.

3
00:00:18,480 --> 00:00:27,379
So, the first thing we are going to do is a perpendicular line to this direction, okay, that pass through the center, okay?

4
00:00:27,379 --> 00:00:39,340
So I put the square set here, the hypotenuse of the square in the direction line.

5
00:00:40,619 --> 00:00:54,039
And now I put the cartabon, I turn the square, and all the lines that I can draw here are going to be perpendicular to the direction.

6
00:00:54,039 --> 00:01:02,280
but I do it passing through the center okay yeah those two lines are

7
00:01:02,280 --> 00:01:08,799
perpendicular one to each other okay so now what I have here is the point of

8
00:01:08,799 --> 00:01:14,620
tangent okay the line that I want to draw must pass through this this point

9
00:01:14,620 --> 00:01:21,260
and or or also it can pass through this other point okay this is possible too

10
00:01:21,260 --> 00:01:31,099
Okay, well, so now the line must be parallel to this direction and perpendicular to the line that we have drawn.

11
00:01:31,599 --> 00:01:38,780
Okay, so I'm going to put again the square in the direction, down below the cartabon,

12
00:01:38,939 --> 00:01:44,480
and instead of turning the square, I'm going to slide it, just slide it.

13
00:01:44,480 --> 00:01:50,920
Okay, and this is the solution, okay, this is the line tangent to the circumference.

14
00:01:51,260 --> 00:01:54,719
Okay, and parallel to this direction.

15
00:01:54,719 --> 00:02:03,219
But here, okay, we have another possible solution, okay?

16
00:02:04,239 --> 00:02:06,000
Just keep in mind, oops, sorry.

17
00:02:10,759 --> 00:02:17,360
Keep in mind that there are two solutions, okay?

18
00:02:21,780 --> 00:02:24,939
This is perpendicular to, and this is perpendicular to, okay?

19
00:02:25,500 --> 00:02:28,259
Once again, what's the beauty of tangents?

20
00:02:28,560 --> 00:02:34,840
That we can link, okay?

21
00:02:34,840 --> 00:02:44,219
Imagine the line, we can link the line with the circumference, with the arch.