Question

Given: AD diameter of Circle P.

Answer 1

90 degree............

Answer 2

Answer:

Option B $90\°$

Step-by-step explanation:

we know that

The inscribed angle is half that of the arc it comprises.

In this problem the inscribed angle is the measure of angle B

so

$m$

we have that

$arc\ AD=180\°$ -----> the diameter divide the circle into two equal parts

substitute

$m$