Vocabulary: Quadrilaterals

Corresponding Parts of Congruent Triangles are Congruent

• CPCTC

• CPCFC

• Alternate Interior Angles Theorem

• Consecutive Angles

In a polygon, these are the line segments from one vertex to another non-consecutive vertex.

• diagonals

• consecutive angles

• opposite sides

• opposite angles

In a quadrilateral, these are angles with vertices that are not consecutive.

• consecutive angles

• opposite angles

• acute angle

• right angle

In a quadrilateral, these are sides that do not have a common endpoint.

• consecutive

• adjacent

• opposite

• supplementary

Two lines that never intersect and have the same slope.

• parallel

• perependicular

• skew

• concurrent

A quadrilateral in which two pairs of opposite sides are parallel and congruent, and two pairs of opposite angles are congruent is called a

Two consecutive angles of a parallelogram are

The diagonals of a parallelogram _______________________ each other.

Two intersecting lines that form a right angle.

• parallel lines

• perpendicular lines

• concurrent lines

• skew lines

A polygon with four sides is called a