10,12: If the sum of a pair of angles opposite a quadrilateral is 180 °, then It is cyclic.

Theorem 10.12 : If the sum of a pair of opposite angles of a quadrilateral is 180º, the quadrilateral is cyclic.

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

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

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

If the degree measure of the sum of any two opposite angles of a quadrilateral is ………….. ,then it is a cyclic quadrilateral.

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

Prove that the sum of opposite pair of angles of a cyclic quadrilateral is 180^@

Sum of opposite angles in a cyclic quadrilateral is …………

Prove that the sum of opposite pair of angles of a cyclic quadrilateral is 180^(@)