Question

$<marquee>$answer my question..

Answer 1

Hey user

Here is your answer :-

Angle APB is inscribed in semicircle .

Hence angle APB is right angled triangle .

So triangle APB is a right angled triangle .

Angle PAB = 45
Hence angle PBA = 45.

So
AP = PB

PB = a units

Answer 2

Answer:

length is a unit

add my answer as brainlist plzzz