Question -
Answer -
a point Q so that OQ= 12 cm. Length PQ is :
(A) 12 cm (B) 13 cm
(C) 8.5 cm (D) √119 cm
Answer
In the above figure, the line that is drawnfrom the centre of the given circle to the tangent PQ is perpendicular to PQ.
And so, OP ⊥ PQ
Using Pythagoras theorem in triangle ΔOPQ weget,
OQ2 = OP2+PQ2
(12)2 = 52+PQ2
PQ2 = 144-25
PQ2 = 119
PQ = √119 cm
So, option D i.e. √119 cm is the length of PQ.