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

1. double

2. half

3. equal

4. triple

The sum of the opposite angles of a cyclic quadrilateral is :

1. 90°

2. 150°

3. 180°

4. 360°

The exterior angle of a cyclic quadrilateral is equal to :

1. 90°

2. the interior opposite angle

3. the interior adjacent angle

4. any of the interior angles

Any two angles formed in the same segment of a circle are :

1. complementary

2. supplementary

3. each right angle

4. equal