A tangent PQ at a point P of a circle of radius 5 cm meets a line through the centre O at a point Q so that OQ = 12 cm. Length PQ is :
12 cm
8.5 cm
√119 cm
13 cm
ΔOPQ is right angled at P. Using Pythagoras theorem PQ2 = 12 2 – 5 2 = √119 cm