Question

In a quadrilateral first angle+ second angle =180.what special name should be given to this quadrilateral

Answer 1

Solution :

If Sum of adjacent angles is

supplementary in a Quadrilateral

is called a parallelogram .

•••••

Answer 2

1st angle + 2nd angle = 180°

The above two angles add up to 180°, which can only mean that they're adjacent angles. When adjacent angles of a figure add up to 180°, it is a parallelogram.

Hope it helps :)