6.2 Properties of Parallelograms

Front

What are the properties of opposite sides in a parallelogram?

Back

The opposite sides of a parallelogram are congruent (equal in length).

Front

What are the properties of opposite angles in a parallelogram?

Back

The opposite angles of a parallelogram are congruent (equal in measure).

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

What is the relationship between consecutive angles in a parallelogram?

Back

Consecutive angles in a parallelogram are supplementary (they add up to 180 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 consecutive angles are 110 degrees 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 5 cm and the height is 4 cm, what is the area?

Back

Area = 5 cm × 4 cm = 20 cm².

Front

What can be said about the diagonals of a parallelogram?

Back

The diagonals of a parallelogram bisect each other.

Front

If a parallelogram has sides of length 8 cm and 6 cm, what can be said about the lengths of the opposite sides?

Back

The opposite sides will also be 8 cm and 6 cm respectively.

Front

What is the relationship between the diagonals of a rectangle (a type of parallelogram)?

Back

The diagonals of a rectangle are congruent (equal in length).