In a circle with centre

MATHEMATICS · Single correct · GCSE · Mathematics · Geometry and Measures · Geometry and Measures

Problem

O

PA

and

PB

are tangents drawn from an external point

P

, touching the circle at

A

and

B

respectively. If

\angle AOB = 70^{\circ}

, determine

\angle APB

. (a)

90^{\circ}

(b)

55^{\circ}

(c)

110^{\circ}

(d)

70^{\circ}