Prove that the sum of two consecutive angles of a parallelogram is `180^(@).`

Consecutive angles of parallelogram are

Any two consecutive angles of a parallelogram are

In a parallelogram ABCD, prove that sum of any two consecutive angles is 180^(@) .

In a parallelogram ABCD, prove that sum of any two consecutive angles is 180^(@).

The sum of adjacent angles of a parallelogram is

Prove that consecutive angles ofa parallelogram are supplementary.

The sum of two opposite angles of a parallelogram is 130^(@). Find all the angles of the parallelogram.

Prove that the bisectors of two opposite angles of a parallelogram are parallel to each other.

Prove that the sum of the squares of the diagonals of a parallelogram is equal to the sum of the squares of its sides.

Prove that the sum of the squares of the diagonals of a parallelogram is equal to the sum of the squares of its sides.