00:01
Hi there.
00:02
In this question, we have two circles and we have to find the angles 1, 2, 3, 4 and 5.
00:08
Let me just check this one.
00:11
Okay, so let's start off this question by just, we know that the n -a and n -c are the tangents to the circle, and m is the center of the small circle.
00:25
If you just draw a radius from center to the tangent point, so that angle should be 90 degrees.
00:35
So that means the angle 5, angle 5 is equal to 90 degrees.
00:41
So this is the first information that we got here.
00:44
And for the other part, i think you just found that, so there are angle 3 here and the other angles we have.
00:54
So there is 65 here, which is 65 and 80 is given here.
00:59
So from this case what we have to do, we just construct a triangle here, isosolice triangle.
01:07
So this angle is given as 80 degrees and this is the radius for the bigger angle.
01:14
So angle three, angle three, they are equal to each other.
01:17
So if i just construct an isosolist triangle here, let's say if this is alpha, this is alpha.
01:23
So the angle three, i mean for the angle three, two alpha plus 80, which is 180 degrees.
01:29
So the alpha is equal to 50 degrees.
01:32
That means the angle 3, which is equal to 50 degrees.
01:37
So we got these values here.
01:39
Let me just highlight them.
01:41
And the next one, the next one.
01:45
So we can just, so we know that there is angle 4 here.
01:52
So what we have to do, we have to...