Geometry Study guide

A short study guide about math terms in geometry

Quadrilateral

A polygon with four sides and four angles.

Polygon

A closed figure made of three or more straight line segments.

Diameter

A line segment that passes through the center of a circle and connects two points on the circle.

Circumference

The distance around a circle.

Volume

The amount of space inside a three-dimensional object.

Congruent

Having the same size and shape.

Vertex

The point where two or more lines, rays, or edges meet.

Ray

A part of a line that starts at one endpoint and extends forever in one direction.

Parallel Lines

Lines that are always the same distance apart and never intersect.

Perpendicular Lines

Lines that intersect to form right angles (90°).