Question

The angle subtended by the diameter to any point on the circle is equal to degrees.

Answer 1

The angle subtended by the diameter to any point on the circle is equal to ${90}^o.$

We know that the angle subtended by an arc at the centre of a cirlce is double the angle subtended by the arc at any point on the circle.

Here, the angle subtended by the arc AB at the centre is ${180}^o.$

$\therefore \angle ACB=\frac{{180}^o}{2}={90}^o$