Question

C(O, r₁) and C(O, r₂) are two concentric circles with r₁ > r₂ AB is a chord of C(O, r₁) touching C(O, r₂) at C then ______

Options

• AB = r₁

• AB = r₂

• AC = BC

• AB = r₁ + r₂

Answer 1

AC = BC 

Explanation:

∵ AB touches

C(0, r₂)

∴ OC ⊥ AB 

Also, perpendicular from the centre to a chord bisects the chord.

∴ AC = BC