Question

AOB=60 and AB=6cm find measure of A and what is the radius of the circle​

Answer 1

Answer:

(a) In ΔOAB, ∠AOB = 60°

OA = OB

(radius of circle)

∴ ∠OAB = ∠OBA

(opposite angles of equal sides)

∠OAB + ∠OBA +∠AOB = 180°

(sum of all angles of Δ)

∠OAB + ∠OAB = 180° – 60°

2 ∠OAB = 180° – 60°

Hence radius of circle = 6 cm

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Answer 2

answer is 6

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