Parallelograms Properties

Front

What are the properties of opposite sides in a parallelogram?

Back

Opposite sides of a parallelogram are parallel and congruent.

Front

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

Back

Opposite angles of a parallelogram are congruent.

Front

What is the relationship between consecutive angles in a parallelogram?

Back

Consecutive angles in a parallelogram are supplementary.

Front

What is the property of the diagonals in a parallelogram?

Back

The diagonals of a parallelogram bisect each other.

Front

If one angle of a parallelogram is 86 degrees, what is the measure of the opposite angle?

Back

The opposite angle is also 86 degrees.

Front

If two sides of a parallelogram are equal, what can be inferred about the opposite sides?

Back

The opposite sides are also equal.

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 find the measure of an angle in a parallelogram if you know one angle?

Back

Use the property that consecutive angles are supplementary; subtract the known angle from 180 degrees.

Front

What is the formula for 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

Area = 10 cm × 5 cm = 50 cm².