An arc of length 20π cm subtends an angle of 144° at the centre of a circle. Find the radius of the circle.
Answers
Answered by
4
Answer:
r=25cm
Step-by-step explanation:
length of arc= Ф/180 ×πr=20π
144/180 ×r = 20
4/5 ×r=20
r=25cm
Similar questions