Question

please find the right solution for 7th

Answer 1

Here, OA = OB = r [radii of same circle]

⇒ ∠A = ∠B ----- (i)

In ΔOAB,

∠O + ∠A + ∠B = 180°

⇒ 60° + ∠A +∠A  = 180° [using eq. (i)]

⇒ ∠A = 60° 

Thus ∠O = ∠A = ∠B = 60°  

⇒ ΔOAB is an equilateral triangle .

 ⇒ AB = OA = OB = r Hence proved.

Answer 2

here is your answer


hope this will help you out