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

Consecutive angles of 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

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

The measure of one of the parallelogram is 70^(@) . Find the measures of the angles of the parallelogram . The following steps are involved in solving the above problem. Arrange them in sequential order. (A) 70^(@)+x=180^(@)impliesx=110^(@) (B) Let the angle adjacent to 70^(@) be x. (C ) The sum of the measures of adjacent angle of a parallelogram is 180^(@) . (D) The measure of the angles of the parallelogram are 70^(@),110^(@),70^(@) and 110^(@)

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

Prove that the sum of the three angles of a triangle is 180^(@).