The total plane angle subtended by a circle at its centre is

The angle subtended by an arc of a circle at the centre is double the angle subtended by it any point on the remaining part of the circle.

What is the solid angle subtended by a hemisphere at its centre?

Theorem 10.8 : The angle subtended by an arc at the centre is double the angle subtended by it at any point on the remaining part of the circle.

Theorem 10.8 : The angle subtended by an arc at the centre is double the angle subtended by it at any point on the remaining part of the circle.

The angle subtend by a semicircle at the centre is _________.

The angle subtended by a chord at its centre is 60^(@) , then the ratio between chord and radius is

Fill in the Blanks: Angles subtended by an arc at the centre of a circle is _______ the angle subtended by the same arc at any other point on the remaining part of the circle.

If the angle subtended by two chords of a circle at the centre are equal; the chords are equal.

O is the centre of the circle. The angle subtended by the ar BCD at the centre is 150^@ . BC is produced to E. Find angleBAD and angleBCD