Flashcard: Properties of Parallelograms

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 in a parallelogram are 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

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

What does it mean for sides to be congruent?

Back

Congruent sides are sides that are equal in length.

Front

If one angle of a parallelogram is 120 degrees, what are the measures of the other angles?

Back

The opposite angle is also 120 degrees, and the adjacent angles are each 60 degrees.

Front

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

Back

The area of a parallelogram is calculated using the formula: Area = base × height.

Front

What is the significance of the diagonals in a parallelogram?

Back

The diagonals of a parallelogram bisect each other, meaning they cut each other in half.

Front

How do you determine if a quadrilateral is a parallelogram?

Back

A quadrilateral is a parallelogram if one pair of opposite sides is both parallel and equal in length.

Front

What is the relationship between the lengths of the diagonals in a parallelogram?

Back

The diagonals of a parallelogram are not necessarily equal in length, but they bisect each other.