Parallelogram Properties

Front

What is a parallelogram?

Back

A parallelogram is a four-sided figure (quadrilateral) where opposite sides are parallel and equal in length.

Front

What are the properties of a parallelogram?

Back

1. Opposite sides are congruent. 2. Opposite angles are congruent. 3. Diagonals bisect each other.

Front

If m

Back

Set m

Front

What is the sum of the interior angles of a parallelogram?

Back

The sum of the interior angles of a parallelogram is 360 degrees.

Front

How do you determine if a quadrilateral is a parallelogram?

Back

A quadrilateral is a parallelogram if either: 1. Both pairs of opposite sides are parallel. 2. Both pairs of opposite sides are congruent.

Front

What does it mean for diagonals to bisect each other in a parallelogram?

Back

It means that each diagonal divides the other into two equal parts.

Front

If ABCD is a parallelogram, what can you say about angles A and C?

Back

Angles A and C are congruent (equal in measure).

Front

What is the relationship between the lengths of opposite sides in a parallelogram?

Back

Opposite sides of a parallelogram are equal in length.

Front

Which property is NOT true for a parallelogram?

Back

Diagonals are congruent (this is true only for rectangles and rhombuses).

Front

If one angle of a parallelogram is 70 degrees, what are the measures of the other angles?

Back

The opposite angle is also 70 degrees, and the adjacent angles are each 110 degrees.