Question

To verify that adjacent angles of a parallelogram are supplementary

Answer 1

Step-by-step explanation:

let angles be a b c d

To proof:

A+b=180° or c+d = 180°

proof:

Remember that the opposite angles of a parallelogram is parallel

a + b = 180° (same side of the transversal makes 180)

or

a and b makes a straight line (alternate interior angles)

a and b. forms a linear pair

so a+b= 180

thus , adjacent angles of a parallelogram are supplementary