Write ‘True’ or ‘False’ for each of the following:

A.

Every rhombus is a square.

B.

Every square is a rhombus.

C.

Every rhombus is a rectangle.

D.

Every rhombus is a rectangle.

E.

Every rhombus is a parallelogram.

F.

Diagonals of a rhombus need not to be equal in length.

G.

Every parallelogram is a rectangle.

The angles of a quadrilateral are respectively 70°, 92° and 100°. Find the fourth angle.

In a quadrilateral ABCD, the angles A, B, C and D are in the ratio 1 : 2 : 3 : 4. Find the measure of each angle of the quadrilateral.

In a parallelogram ABCD, , Detemine the measur of .

The measures of two adjacent angles of a parallelogram are in the ratio 4 : 5. Find the measure of each of the angles of the parallelogram.

If an exterior angle of a regular polygon is 45°. then find the number of its sides.

If an interior angle of a regular polygon is 162°, then find the number of its sides.

Find x in the following figure.

Find the measure of an interior angle of a regular polygon having 15 side

Find the measure of each of the

(i) exterior angle,

(ii) interior angle of an octagon.