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 sides in a parallelogram?

Back

In a parallelogram, opposite sides are congruent (equal in length).

Front

What is true about the angles in a parallelogram?

Back

The opposite angles in a parallelogram are congruent, and consecutive angles are supplementary (add up to 180 degrees).

Front

If one angle of a parallelogram measures 40 degrees, what is the measure of the opposite angle?

Back

The opposite angle also measures 40 degrees.

Front

If one angle of a parallelogram measures 40 degrees, what is the measure of the consecutive angle?

Back

The consecutive angle measures 140 degrees.

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 can be said about the diagonals of a parallelogram?

Back

The diagonals of a parallelogram bisect each other but are not necessarily congruent.

Front

If the diagonals of a quadrilateral are congruent, what can be inferred about the shape?

Back

If the diagonals of a quadrilateral are congruent, it may be a rectangle or a rhombus.

Front

How do you find the value of x in a parallelogram when given angles?

Back

Use the properties of angles in a parallelogram: opposite angles are equal, and consecutive angles are supplementary.

Front

What is the relationship between the sides of a parallelogram?

Back

In a parallelogram, opposite sides are parallel and equal in length.