Question 1 — Inscribed Angle Theorem
The diagram shows a circle with points A, B, and C on the circumference.
The inscribed angle ∠ABC = 38°.
Find the size of the arc AC (the central angle subtended by arc AC).
Question 2 — Angle at the Centre
P, Q, and R are points on a circle with centre O.
The central angle ∠POQ = 112°.
(a) Find the inscribed angle ∠PRQ.
(b) State the theorem you used.