Quadrilaterals ...

Find the value of $$x + y + z + w$$

If the diagonals of a quadrilateral bisect one another at right angles, then the quadrilateral is a:

The angles of a quadrilateral are $$\displaystyle x^{\circ},\left ( x+5 \right )^{\circ},\left ( x+10 \right )^{\circ}\: and\: \left ( x+25 \right )^{\circ}$$ then value of x is

If in a quadrilateral ABCD, $$\angle A = 120^o, \angle B = 60^o, \angle C = 100^o$$ then $$\angle D =$$ ...............

In a quadrilateral $$ABCD$$, $$\displaystyle \angle A +\angle C = 180^{\circ}$$ then $$\displaystyle \angle B + \angle D$$ =

If in a quadrilateral the diagonals bisect each other, then it is a_____.

A parallelogram with equal angles is called a ..............................

Refer to the figure above and calculate the value of $$x$$, if one angle is a right angle.

Can the angles $$110^o, 80^o, 90^o$$ & $$105^o$$ be the angles of quadrilateral?

All the angles of a quadrilateral can be ___________.