Question

In the figure OA is a radius and PA is the tengent to the circle at A. If OP=5cm

OA = 3 cm, then

a) What is the measure of <OAP ?

b) Calculate the length of PA ?​

Answer 1

OAP is a triangle which

OA=3cm,OP=3cm

(1) the measurement of OAP=90°

(2) it is a acute triangle

then PA=√5^2-3^2

=√25-9

= √16

=4