Parallelograms Review

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 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

If one angle of a parallelogram is 51°, what are the measures of the other angles?

Back

The opposite angle is also 51°, and the adjacent angles are 129° each.

Front

How do you find the length of a side in a parallelogram given the opposite side?

Back

In a parallelogram, opposite sides are equal in length.

Front

What is the relationship between adjacent angles in a parallelogram?

Back

Adjacent angles in a parallelogram are supplementary, meaning they add up to 180 degrees.

Front

If the length of one side of a parallelogram is 10 cm, what is the length of the opposite side?

Back

The length of the opposite side is also 10 cm.

Front

Solve for x: The figure is a parallelogram. If one angle is x and the adjacent angle is 129°, what is x?

Back

x = 51°.

Front

What is the formula for the area of a parallelogram?

Back

The area of a parallelogram is given by the formula: 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.