Question

please answer it correctly!​

Answer 1

Step-by-step explanation:

️ APB is in a semicircle.

therefore, angle P = 90°

angle A = angle B

(angles of an isoceles triangle are equal)

angles in a ️ = 180°

angle A + angle B + angle P = 180°

2 angle A + 90° = 180°

2 angle A = 90°

angle A = 45°

Answer 2

Answer:

as O is the centre of circle and AB passes through O

therefore,AB is diameter

angle APB=90° (angle in semicircle)

in ∆ APB ,AP=PB

therefore, Angle PAB= Angle PBA=X(say)

angle APB +angle PAB+angle PBA=180°

x+x+90=180

2x=90

X=45

so, angle A = 45°