Euclidean Geometry

A triangle with one 90 degree right angle.

• Acute Triangle

• Right Triangle

• Obtuse Triangle

• Equilateral Triangle

Two or more lines that share a common point of intersection.

• Parallel Lines

• Intersecting Lines

• Ray

• Line Segment

Two lines that intersect at 90 degree angles.

• Parallel Lines

• Skew Lines

• Perpendicular Lines

• Line Segment

Two lines in the same plane that will never intersect

• Parallel Lines

• Skew Lines

• Perpendicular Lines

• Line Segment

The geometry of flat planes, straight lines, and points.

• Euclidean Geometry

• Coordinate Geometry

• Coordinate Proof

• Spherical GeometrySadsf

Part of a line beginning from an endpoint and then continuing forever.

• Ray

• Line

• Line Segment

• Straight Angle

Part of a line consisting of two endpoints and all points in between them.

• Ray

• Line

• Line Segment

• Straight Angle

A flat surface with no thickness that extends in all directions forever.

• Ray

• Line

• Plane

• Parallelogram

A straight path that has no thickness and extends forever.

• Ray

• Line

• Plane

• Line Segment

A location that has no size.

• Ray

• Point

• Plane

• Dot