Proving Quadrilaterals

Front

Consecutive angles of parallelograms are ______.

Back

supplementary

Front

If you wanted to prove that Quadrilateral ABCD is a Parallelogram, what would be the best piece of evidence to use?

Back

Slope of AC = Slope of BD, therefore Side AC is parallel to Side BD

Front

The diagonals of a parallelogram _______ each other.

Back

bisect

Front

Opposite sides of parallelograms are _______ and _______.

Back

parallel and congruent

Front

On the coordinate plane, how do you prove two lines are parallel?

Back

Use the slope formula and show the slopes are the same.

Front

What is a parallelogram?

Back

A quadrilateral with opposite sides that are both parallel and congruent.

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 its sides?

Back

If one pair of opposite sides is both parallel and congruent.

Front

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

Back

They are congruent.

Front

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

Back

360 degrees.