Parallelogram Properties

Front

What is a parallelogram?

Back

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

Front

What are the properties of a parallelogram?

Back

1. Opposite sides are equal in length. 2. Opposite angles are equal. 3. Diagonals bisect each other.

Front

Which property is NOT true for a parallelogram?

Back

Diagonals are congruent.

Front

How can you determine if a quadrilateral is a parallelogram?

Back

If one pair of opposite sides is both parallel and equal in length, then the quadrilateral is a parallelogram.

Front

What is the relationship between the diagonals of a parallelogram?

Back

The diagonals of a parallelogram bisect each other.

Front

If two sides of a quadrilateral are equal and parallel, what can be concluded?

Back

The quadrilateral may be a parallelogram, but more information is needed.

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

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 other two angles are 110 degrees each.

Front

What can be said about the opposite sides of a parallelogram?

Back

The opposite sides of a parallelogram are equal in length and parallel.

Front

If the diagonals of a quadrilateral bisect each other, what can be inferred?

Back

The quadrilateral may be a parallelogram.