Question

The number of equal angles an arc subtends in the opposite
segment is​

Answer 1

An arc of a circle is any part of the circumference.

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