Question

In the circles of radius 4cm, find the length of arcAB.

Answer 1

Answer:

LAOB=30 Degree

Sides of the rtLed triangle ONA

are in the ratio

2:2v 3:4, ie, I: v3:2

Hence the angles opposite to them

are 30:60:90

here the angle opposite to the side

2cm=30 degree ie, LAOB = 30°

Now the length of arc ABC Canbe

calculated by Xx2πr /360

30x2x3.14x4/360=226.08cm