2D - 3D Shapes Vocabulary

Two lines that intersect to form right angles

Two times

The point of intersection of two sides of a polygon. The point of intersection of three edges of a space figure

A closed figure formed by three or more line segments

A polygon with all sides and all angles equal

Having the same shape, size and position on both sides of a dividing line

Two lines that never intersect

Lines that cross at one point

In addition

An angle that is less than 90 degrees

An angle that measures more than 90 degrees but less than 180 degrees

A polygon that has at least one diagonal with points outside the polygon

A polygon in which each interior angle has a measure less than 180

A line segment formed by the intersection of two faces -> Edges of a polyhedron