In the given figure, ABCD is a cyclic quadrilateral. The measure of its greatest angle is :

1. 135°

2. 140°

3. 150°

4. 160°

In the given figure, O is the centre of the circle.
If ∠PQR = 35°, then ∠POR is equal to :

1. 17.5°

2. 35°

3. 60°

4. 70°

ABCD is a cyclic quadrilateral such that AC is a diameter of the circle. If ∠BAC = 58° and ∠DAC = 65°, then ∠BCD is equal to :

1. 57°

2. 123°

3. 90°

4. 60°

The angle formed in a minor segment of a circle is :

1. an acute angle

2. an obtuse angle

3. a right angle

4. either an acute or an obtuse angle