Question

PT is a tangent from P . PA is 9 cm and AB is 7cm . calculate the length of the tangent​

Answer 1

Answer:

Using pythagoras theorem,

OP

2

+PQ

2

=OQ

2

⇒OQ

2

+24

2

=25

2

⇒OQ

2

=25

2

−24

2

⇒OQ

2

=625−576=49

⇒OQ=

49

=7cm

∴ Radius of the circle is 7cm