Question

from a point q, the length of the tangent to a circle is 24cm and the distance from the centre is 25cm.the radius of the circle is ​

Answer 1

Let QP be the tangent, such that, Point of contact is P.

Length of the tangent to a circle = 24cm

$$PQ=24cm$$

Let O be the centre of the circle.

OQ=25cm

We have to find the radius OP

Since QP is tangent

OP perpendicular to QP (Since, Tangent is Perpendicular to Radius at the point of contact)

So, ∠OPQ=90

∘

So apply Pythogoras theorem to right triangle, OPQ;

OP

2

=OQ

2

−PQ

2

OP

2

=25

2

−24

2

OP

2

=49cm

OP=

49

OP=7cm

option A is the answer.

Answer 2

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