Math Basic Geometry: Shapes

Front

An angle less than 90 degrees

Back

acute angle

Front

A figure made by two intersecting lines or two rays extending from the same point

Back

angle

Front

An angle between 90 and 180 degrees

Back

obtuse angle

Front

a two-dimensional, four-sided shape made of two pairs of parallel sides of equal length that are opposite one another

Back

parallelogram

Front

a two-dimensional, four-sided shape made of two pairs of parallel sides that are opposite one another and four right angles

Back

rectangle

Front

A two-dimensional shape made of four sides of equal length and in which the pairs of opposite sides are parallel.

Back

Rhombus

Front

A 90-degree angle formed by two perpendicular lines or line segments.

Back

right angle

Front

A two-dimensional, four-sided shape that has four right angles and all sides are equal in length.

Back

Square

Front

A two-dimensional, four-sided shape with one pair of opposite sides that are parallel.

Back

trapezoid

Front

a geometric figure that has three straight sides and three angles

Back

triangle