Basics of Geometry Vocabulary

Angle Bisector

• Two angles whose measures have a sum of 180°.

• Two angles whose measures have a sum of 90°.

• A ray that divides an angle into two angles that are congruent.

• Two angles that share a common vertex and side, but have no common interior points.

Tags

CCSS.7.G.B.5

Line Segment

• Points that lie on the same line.

• Line segments that have the same length.

• The set of points two or more geometric figures have in common.

• Consists of two endpoints and all the points between them.

Tags

CCSS.HSG.CO.A.1

Coplanar Points

• A real number that corresponds to a point on a line.

• Points that lie in the same plane.

• Points that represent the ends of a line segment or ray.

• A line has one dimension. It is represented by a line with two arrowheads, but it extends without end.

Tags

CCSS.HSG.CO.A.1

Endpoints

• A real number that corresponds to a point on a line.

• Points that lie in the same plane.

• Points that represent the ends of a line segment or ray.

• A line has one dimension. It is represented by a line with two arrowheads, but it extends without end.

Tags

CCSS.4.G.A.1

Line

• A real number that corresponds to a point on a line.

• Points that lie in the same plane.

• Points that represent the ends of a line segment or ray.

• A line has one dimension. It is represented by a line with two arrowheads, but it extends without end.

Tags

CCSS.4.G.A.1

Midpoint

• The point that divides a segment into two congruent segments.

• A flat surface made up of points that has two dimensions and extends without end and is represented by a shape that looks like a floor or wall.

• A location in space that is represented by a dot and has no dimension.

• A rule that is accepted without proof.

Tags

CCSS.HSG.GPE.B.6

Point

• The point that divides a segment into two congruent segments.

• A flat surface made up of points that has two dimensions and extends without end and is represented by a shape that looks like a floor or wall.

• A location in space that is represented by a dot and has no dimension.

• A rule that is accepted without proof.

Tags

CCSS.HSG.CO.A.1

Postulate

• The point that divides a segment into two congruent segments.

• A flat surface made up of points that has two dimensions and extends without end and is represented by a shape that looks like a floor or wall.

• A location in space that is represented by a dot and has no dimension.

• A rule that is accepted without proof.

Tags

CCSS.HSG.CO.A.1

Collinear Points

• Points that lie on the same line.

• Line segments that have the same length.

• The set of points two or more geometric figures have in common.

• Consists of two endpoints and all the points between them.

Tags

CCSS.HSG.CO.A.1

A flat surface made up of points that has two dimensions and extends without end and is represented by a shape that looks like a floor or wall.

• Point

• Plane

• Angle

• Line

Tags

CCSS.HSG.CO.A.1