(a)[1]
State the size of angle $OPA$.
(b)[2]
Calculate the radius of the circle.
Mathematics 0580 · IGCSE · Circle theorems I
Circle theorems I — practice question
The diagram shows that $AP$ is a tangent to the circle at $P$. $O$ marks the centre of the circle, $\angle PAO = 37^{\circ}$ and $AP = 11\,\text{cm}$.