If in a parallelogram its diagonals bisect each other at right angles and are equal, then it is a

ABCD is a trapezium in which AB || DC and ∠A = ∠B = 45º. Find angles C and D of the trapezium.

Three angles of a quadrilateral are 75º, 90º and 75º. The fourth angle is

ABCD is a rhombus such that ∠ACB = 40º. Then ∠ADB is

The diagonals of a parallelogram:

Angles of a quadrilateral are in the ratio 3 : 4 : 4 : 7. Find all the angles of the quadrilateral.

In a parallelogram, opposite angles are:

ABCD is a parallelogram. If its diagonals are equal, then find the value of ∠ABC.

If in a parallelogram its diagonals bisect each other and are equal then it is a,

One angle of a quadrilateral is of 108º and the remaining three angles are equal. Find each of the three equal angles.

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

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

The angle between two altitudes of a parallelogram through the vertex of an obtuse angle of the parallelogram is 60º. Find the angles of the parallelogram.