1. Three angles of a quadrilateral are 75°, 90°and 75°, the fourth angle is

2. A diagonal of a rectangle is inclined to one side of the rectangle at 25°. The acute angle between the diagonals is

3. ABCD is a rhombus such that ∠ACB = 40°, then ∠ADB is

4. If angles A, B, C and D of a quadrilateral ABCD, taken in order, are in the ratio 3 : 7 : 6 : 4, then ABCD is a

5. The diagonals AC and BD of a || gm ABCD intersect each other at the point O. If ∠DAC = 32° and ∠AOB = 70°, then ∠DBC is equal to

6. ABCD is a rhombus such that ∠ABC = 40°, then ∠ADC is equal to

7. In the following figure, ABCD and AEFG are two parallelograms. If ∠C = 60°, then ∠GFE is

8. The bisectors of any two adjacent angles of a || gm intersect at

9. If one angle of a parallelogram is 24° less than twice the smallest angle, then the measure of the largest angle of a parallelogram is

10. If the diagonal of a rhombus are 18 cm and 24 cm respectively, then its side is equal to