Q17 is my doubt?! And why is OP perpendicular bisector of AB
Q.17. In figure, AB is a chord of a circle, with centre O, such that AB = 16 cm and radius of circle is 10 cm. Tangents at A and B intersect each other at P. Find the length of PA.
Kindly, refer to the below link for similar query,
https://www.meritnation.com/ask-answer/question/in-fig-6-ab-is-a-chord-of-a-circle-with-centre-o-such/circles/11041269
https://www.meritnation.com/ask-answer/question/a-point-p-to-a-circle-with-centre-o-touching-it-at-a-an/circles/3694236
Regards.
https://www.meritnation.com/ask-answer/question/in-fig-6-ab-is-a-chord-of-a-circle-with-centre-o-such/circles/11041269
https://www.meritnation.com/ask-answer/question/a-point-p-to-a-circle-with-centre-o-touching-it-at-a-an/circles/3694236
Regards.