Geometric Concepts and Definitions

Front

CONGRUENT SEGMENTS

Back

If two segments have the same length, then they are congruent.

Front

PLANE

Back

A plane is a flat surface made up of points and extends indefinitely in all directions.

Front

COPLANAR

Back

Points that lie on the same plane. Non-coplanar: points that do not lie on the same plane.

Front

PERPENDICULAR BISECTOR

Back

Two lines that intersect at a 90° angle (right angle).

Front

LINE

Back

A line is made up of points with no thickness or width.

Front

ANGLE

Back

An angle is formed by two rays with a common endpoint called the vertex.

Front

MIDPOINT

Back

The midpoint of a segment is the point that divides the segment into two equal parts.

Front

PARALLEL LINES

Back

Two lines that never intersect and are always the same distance apart.

Front

TRANSVERSAL

Back

A line that intersects two or more lines at different points.

Front

ACUTE ANGLE

Back

An angle with a degree measure less than 90°.