Question

33. Point A lies in the exterior of a circle with centre p and radius 10 cm. A tangent
from A touches the circle at B. If PA ​

Answer 1

Since tangent is perpendicular to the radius through the point of contact

so, PQ⊥OQ

therefore

(PQ)

2

+(OQ)

2

=(OP)

2

=(5)

2

+r

2

=(13)

2

=r

2

=169−25

⇒r

2

=144

⇒r=12cm

so, diameter of the circle 2×r

=2×12 =24cm

Answer 2

Hey, I'M Darshan!!!!!!

!!!!!!!Hope is help for you!!!!!!

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