5. If each angle of a quadrilateral is less than 180, So that quadrilateral is called- (A) concave (B) Convex (C) parallel (D) rhombus.

If the diagonals of a quadrilateral bisect each other at right angle, then the quadrilateral is a parallelogram (b) rectangle (c) rhombus (d) kite

The sum of angles of a concave quadrilateral is

If the diagonals of a quadrilateral bisect each other at right angle, then the quadrilateral is a (a) parallelogram (b) rectangle (c) rhombus (d) kite

If the sum of the pairs of opposite angles of a quadrilateral is 180^@ , then the quadrilateral is

Sum of all the interior angles of a quadrilateral is 180^(@) ?.

If the sum of any pair of opposite angles of a quadrilateral is 180^@ ; then the quadrilateral is cyclic.

If the diagonals of a quadrilateral bisect each other at right angle, prove that the quadrilateral is a rhombus.

If the sum of any pair of opposite angles of a quadrilateral is 180^(@) ; then the quadrilateral is cyclic.