Question

The angle at the center is 60 degree, then the angle at the circumference drawn on the same arc is......

Answer 1

The angle subtended by an arc at any point is the angle formed between the two line segments joining that point to the end-points of the arc.

In the following figure, an arc of the circle shown subtends an angle α

α

at a point on the circumference, and an angle β

β

at the centre O

O