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 is a property of parallelograms regarding consecutive angles?

Back

Consecutive angles are supplementary.

Front

What is a property of parallelograms regarding diagonals?

Back

Diagonals bisect each other.

Front

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

Back

40° (Opposite angles are congruent.)

Front

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

Back

140° (Consecutive angles are supplementary.)

Front

In a parallelogram, if one side measures 6 cm, what is the length of the opposite side?

Back

6 cm (Opposite sides are congruent.)

Front

If the measure of angle A in a parallelogram is 50°, what is the measure of angle B?

Back

130° (Consecutive angles are supplementary.)

Front

True or False: The diagonals of a parallelogram are always equal in length.

Back

False (Diagonals bisect each other but are not necessarily equal.)

Front

If the lengths of two adjacent sides of a parallelogram are 5 cm and 12 cm, what can be said about the opposite sides?

Back

They are also 5 cm and 12 cm respectively (Opposite sides are congruent.)