In the figure below, the pair of tangents AP and AQ drawn from an external point A to a circle with centre O are perpendicular to each other and length of each tangent is 5 cm. Then the radius of the circle is
A. 10 cm
B. 7.5 cm
C. 5 cm
D. 2.5 cm
Answer:C
In the figure below, the pair of tangents AP and AQ drawn from an external point A to a circle with centre O are perpendicular to each other and length of each tangent is 5 cm. Then the radius of the circle is
A. 10 cm B. 7.5 cm C. 5 cm D. 2.5 cm
Explanation: Join OP and OQ.