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  • A point P is 13 cm from the centre of the circle. The length of the tangent drawn from P to the circle  is 12 cm. Then the radius of the circle is  <

A point P is 13 cm from the centre of the circle. The length of the tangent drawn from P to the circle  is 12 cm. Then the radius of the circle is

 

Option: 1

4 cm


Option: 2

6 cm


Option: 3

5 cm


Option: 4

None of these


Answers (1)

best_answer

OP2 = OT2 + PT2 [By Pythagoras Theorem]  

132 = OT2 + 122  

OT2 = 132 – 122 = 169 - 144 = 25  

OT = 5  

Radius of the circle = 5 cm 

 

Posted by

HARSH KANKARIA

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