Geometry Vocab

An angle with a degree measure less than 90

The amount of space between two points.

Lines that form right angles

A triangle in which all the angles are acute angles.

A point is in the exterior of an angle if it is neither on the angle nor in the interior of the angle.

A basic undefined term of geometry. a flat surface made up of points that has no depth and extends indefinitely in all directions.

Two angles that lie in the same plane, have a common vertex and a common side, but no common interior points.

A point is in the interior of an angle if it does not lie on the angle itself and it lies on a segment with endpoints that are on the sides of the angle.

A basic undefined term. a point is a locations. they are represented by a dot and are named by capital letters.

The intersection of two noncollinear ray at a common endpoint.

A basic undefined term. it is made up of points and has no thickness of width.

A statement that describes a fundamental relationship between the basic terms of geometry. they are accepted as true without proof.example: through any two points there is exactly one line.

A ray that divided an angle into two congruent angles.

A measurable paret of a line that consists of two points, called endpoints, and all of the points between them.

It is part of a line. it has one endpoint and extends indefinitely in one direction.