From external point P, a tangent PQ is drawn to a circle, with the centre O, touching the circle at Q. if the distance of P from the centre is 13 cm and length of the tangent PQ is 12 cm, then the radius of the circle is:
Show answer & explanation
Correct answer: A
Explanation
The correct answer is Option 1 i.e 5 cm
Given, PO = 13 cm, PQ = 12 cm
OQ = (132 - 122)1/2 = (169 -144)1/2 = 251/2 = 5 cm
Radius = OQ = 5cm