Basic Properties of Parallelograms

Front

What is a property of parallelograms regarding opposite sides?

Back

Opposite sides are congruent.

Front

What is a property of parallelograms regarding opposite angles?

Back

Opposite angles are congruent.

Front

What can be said about consecutive angles in a parallelogram?

Back

Consecutive angles are supplementary.

Front

What happens to the diagonals of a parallelogram?

Back

Diagonals bisect each other.

Front

If one angle of a parallelogram is 40°, what is the measure of the opposite angle?

Back

40°.

Front

If one angle of a parallelogram is 140°, what is the measure of the consecutive angle?

Back

40°.

Front

In a parallelogram, if one angle measures 50°, what is the measure of the opposite angle?

Back

50°.

Front

In a parallelogram, if one angle measures 180°, what can be said about the other angles?

Back

This is not possible; angles in a parallelogram cannot be 180°.

Front

What is the relationship between the diagonals of a parallelogram?

Back

The diagonals bisect each other.

Front

In a parallelogram, if one angle is 70°, what is the measure of the adjacent angle?

Back

110°.