Geometry Vocabulary

Front

area

Back

the amount of space inside the boundary of a two-dimensional object

Front

polygon

Back

a closed figure formed by three or more line segments that meet only at their edges

Front

vertex

Back

the point where two sides of a polygon meet (can be represented as ordered pairs)

Front

perimeter

Back

the distance around a two-dimensional shape

Front

quadrilateral

Back

a polygon with four sides

Front

parallelogram

Back

a quadrilateral in which opposite sides are parallel and congruent

Front

rhombus

Back

a quadrilateral in which all sides are congruent and opposite sides are parallel

Front

trapezoid

Back

a quadrilateral in which two sides are parallel

Front

triangle

Back

a three-sided polygon (where the sum of the angles is 180 degrees)