Tests for Parallelograms

Front

What is a parallelogram?

Back

A parallelogram is a four-sided figure (quadrilateral) with opposite sides that are both 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 do you determine if a quadrilateral is a parallelogram?

Back

A quadrilateral is a parallelogram if: 1. Both pairs of opposite sides are parallel. 2. Both pairs of opposite sides are equal. 3. One pair of opposite sides is both parallel and equal.

Front

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

Back

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

Front

If three angles of a quadrilateral are 90°, 80°, and 70°, what is the measure of the fourth angle?

Back

The fourth angle is 120°.

Front

What is the relationship between the angles in a parallelogram?

Back

In a parallelogram, opposite angles are equal, and consecutive angles are supplementary (add up to 180°).

Front

If one angle of a parallelogram is 60°, what are the measures of the other angles?

Back

The opposite angle is also 60°, and the other two angles are 120° each.

Front

What is the formula for finding the area of a parallelogram?

Back

Area = base × height.

Front

If the base of a parallelogram is 10 cm and the height is 5 cm, what is the area?

Back

The area is 50 cm².

Front

What does it mean for sides to be 'parallel'?

Back

Two lines or sides are parallel if they are always the same distance apart and never meet.