Properties of Parallelograms

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

In a rhombus, what is true about the angles?

Back

All sides are equal, and opposite angles are equal. The diagonals bisect the angles.

Front

How do you find the measure of an angle in a parallelogram?

Back

Use the property that consecutive angles are supplementary (sum to 180 degrees).

Front

What is the relationship between the diagonals of a parallelogram?

Back

The diagonals bisect each other.

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 the area of a parallelogram?

Back

Area = base × height.

Front

In a rhombus, how do the diagonals behave?

Back

The diagonals are perpendicular to each other and bisect the angles.

Front

What is the measure of each angle in a rectangle?

Back

Each angle in a rectangle measures 90 degrees.

Front

How can you determine if a quadrilateral is a parallelogram?

Back

If one pair of opposite sides is both equal and parallel, then the quadrilateral is a parallelogram.

Front

What is the significance of the diagonals in a rhombus?

Back

They bisect each other at right angles and bisect the vertex angles.