Geometry Vocabulary

A flat or curved surface of a solid.

A three-dimensional figure that encloses a space.

A point where three or more edges of a polyhedron intersect.

A line segment or curve where two faces of a solid intersect.

A solid whose faces are all polygons.

A closed figure in a plane that is made up of three or more line segments that intersect only at their endpoints: for example, parallelograms and triangles.

A figure with 4 straight sides.

Lines that intersect at a right angle, 90°.

Two lines on the same plane; never intersect; always the same distance apart.

Flat, two-dimensional object.