Quadrilateral Terminology

Front

Vertex

Back

A point where two sides of a quadrilateral meet.

Front

Diagonal

Back

A line segment connecting two non-adjacent vertices of a quadrilateral.

Front

Opposite sides

Back

Two sides of a quadrilateral that are across from each other and do not share a vertex.

Front

Adjacent sides

Back

Two sides of a quadrilateral that share a vertex.

Front

Opposite angles

Back

Two angles of a quadrilateral that are across from each other.

Front

Adjacent angles

Back

Two angles of a quadrilateral that share a vertex and a side.

Front

Parallelogram

Back

A Quadrilateral with the following attributes:

*Opposite sides are congruent

*Opposite angles are congruent

*Consecutive angles are supplementary

*Diagonals bisect each other

* Each diagonal bisects to create two congruent triangles

Front

Rectangle

Back

Is a Parallelogram with the following attributes:

*Opposite sides are congruent

*All angles are right angles (90 degrees)

*Consecutive angles are supplementary

*Diagonals bisect each other

* Each diagonal bisects to create two congruent triangles

Front

Rhombus

Back

Is a Parallelogram with the following attributes:

*All 4 sides are congruent

*Opposite angles are congruent

*Consecutive angles are supplementary

*Diagonals bisect each other

* Each diagonal bisects to create two congruent triangles

Front

Square

Back

Is a Parallelogram with the following attributes:

*All four sides are congruent

*All angles are right angles (90 degrees)

*Consecutive angles are supplementary

*Diagonals bisect each other

* Each diagonal bisects to create two congruent trianlges