Properties of Parallelograms

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. The diagonals bisect each other. 4. Consecutive angles are supplementary.

Front

How many pairs of parallel sides does a parallelogram have?

Back

A parallelogram has two pairs of parallel sides.

Front

If one angle of a parallelogram is 68 degrees, what are the measures of the opposite angle?

Back

The opposite angle is also 68 degrees.

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 the measure of angle B in parallelogram ABCD is 79 degrees, what is the measure of angle D?

Back

The measure of angle D is 79 degrees.

Front

What do we call a parallelogram with four right angles?

Back

A rectangle.

Front

What do we call a parallelogram with all sides equal in length?

Back

A rhombus.

Front

If the diagonals of a parallelogram are equal, what type of parallelogram is it?

Back

It is a rectangle.

Front

In parallelogram ABCD, if AB = 15 cm and CD = 15 cm, what can we say about the lengths of AD and BC?

Back

AD = BC = 15 cm (opposite sides are equal).