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1. The angles of a quadrilateral are respectively 120°, 75° and 135°, the measure of fourth angle is:

2. The opposite angles of a parallelogram are (3x - 2)° and (50 - x)° the measure of these angles is

3. Diagonals of a quadrilateral are of lengths 10 cm and 24 cm. If the diagonals bisect each other at right angles, then the length of each side is

4. In quadrilateral PQRS, if ∠P = 60° and ∠Q : ∠R : ∠S = 2 : 3 : 7, then ∠S =

5. Which of the following is not a parallelogram?

6. The angles of a quadrilateral are (5x)°, (3x + 10)°, (6x – 20)° and (x + 25)°. Now, the measure of each angle of the quadrilateral will be

7. The angles of a quadrilateral are in the ratio 3:5:9:13 . The measure of angles of quadrilateral are:

9. All the angles of a convex quadrilateral are congruent. However, not all its sides are congruent. What type of quadrilateral is it?