8.1 - Parallelograms

Front

What is a defining property of parallelograms regarding their sides?

Back

Opposite sides are congruent.

Front

What value of x would classify a quadrilateral with sides of length 2x and 8 as a parallelogram?

Back

x = 4.

Front

If a quadrilateral has sides of length 5x and 125, what value of x classifies it as a parallelogram?

Back

x = 25.

Front

Fill in the blank: If the diagonals of a quadrilateral __________ each other, then the quadrilateral is a parallelogram.

Back

Bisect.

Front

What is one method to prove that a quadrilateral is a parallelogram?

Back

One pair of opposite sides are parallel and congruent.

Front

What is the sum of the interior angles of a parallelogram?

Back

360 degrees.

Front

What can be said about the opposite angles of a parallelogram?

Back

They are congruent.

Front

What is the relationship between the consecutive angles of a parallelogram?

Back

They are supplementary (add up to 180 degrees).

Front

What is the property of the diagonals in a parallelogram?

Back

The diagonals bisect each other.

Front

How can you determine if a quadrilateral is a parallelogram using slopes?

Back

If both pairs of opposite sides have the same slope, then it is a parallelogram.