1.

In parallelogram PQRS,one of its interior angles measure 80°. Find out the measure of the remaining angles.​

Answer»

In a parallelogram OPPOSITE ANGLES are EQUAL and opposite sides are PARALLEL. thus two angles on the same side are supplementary

therefore, in the parallelogram

the angle opposite to the 80* will be 80*

and the other two angles will be

                  2x + 2(80*) = 360*

                  2x = 360* - 160*

                  x = 200*/2 = 100*

The angles of parallelogram are 100,80,100,80


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