00:01
So this question is saying a circle has a radius of 10 meters, let's assume, and intercepted by a central angle.
00:14
So let's assume that this is the angle here.
00:18
The angle is given to be pi by 4, but this is given in the form of radians.
00:30
So the value theta is given to be pi divided by 4 in radians, and the radius r is given to be 10 meters.
00:41
Now what is important to know is if you want to find out the length of this arc, this length here, length of the arc as a formula, which is theta by 360 into 2 pi into r.
00:58
So i'm going to be taking pi as 22 by 7 and round off finally.
01:03
So theta is actually in radians, but it has to be in degrees.
01:07
Theta must be in degrees.
01:11
So we need to convert that...