Question

Find the radius of the circle. A. 10 cm B. 20 cm C. 34 cm D. 17 cm.​

Answer 1

Answer:

Given AB=30cm

⇒AM+MB=30

⇒2AM=30(∵AM=MB)

⇒AM=15cm

In Δ

le

OMB(OMB=90

∘

)

O→ Center of circle

AB→ chord

∴OM

2

+MB

2

=OB

2

⇒8

2

+15

2

=R

2

⇒R

2

=289

⇒R=17cm