An angle less than 90 degrees

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

An angle between 90 and 180 degrees

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

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

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

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

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

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

a geometric figure that has three straight sides and three angles