Tools of Geometry

An undefined term, which identifies a location, but has no size or thickness

• Point

• Line

• Plane

• Angle

An undefined term, which has an infinite length and an infinite number of points

• Point

• Line

• Plane

• Angle

An undefined term, flat 2D surface extending infinitely in all directions, must contain at least 3 points

• Point

• Line

• Plane

• Angle

2 rays (sides) that share 1 common endpoint called the vertex

• Ray

• Line Segment

• Plane

• Angle

a part of a line with only 1 endpoint

• Ray

• Line Segment

• Plane

• Angle

a part of a line with 2 endpoints and has length

• Ray

• Line Segment

• Plane

• Angle

points that are together on the same line

• Coplanar

• Line Segment

• Collinear

• Midpoint

Anything that is together on the same plane

• Coplanar

• Line Segment

• Collinear

• Midpoint

A point exactly in the middle of a segment, divides into two congruent segments

• Coplanar

• Line Segment

• Collinear

• Midpoint

Two angles with a common vertex AND a common side "next to"

• Adjacent Angles

• Angle Bisector

• Complementary Angles

• Vertical Angles