Mathematics for IGCSE & O level - Circle Theorems (Section 2 - No. 1)
What is the property of angle subtended at the center by an arc?
It is the same as the angle at the circumference subtended by the same arc.
It is half the angle at the circumference subtended by the same arc.
It is twice the angle at the circumference subtended by the same arc.
It is one-fourth the angle at the circumference subtended by the same arc.
Explication
The angle subtended at the center by an arc is twice the angle at the circumference subtended by the same arc.