25 terms

Point

Simply a location (neither has shape nor size)

Line

Made up of points (no thickness or width)

Plane

Flat surface made up of points (no depth and extends infinitely in all directions)

Space

Boundless, three dimensional set of all points

Intersecting Lines

These types of lines have one point in common

Concurrent Lines

These lines occur when three or more lines intersect at a common point

Parallel Lines

These lines do not intersect and lie in the same plane

Skewed Lines

These lines do not intersect and lie in different planes

Half Line

Contains all points on one side of a given point ( open circle )

Ray

The union of a point and a half line( includes one endpoint and continues infinetly in one direction)

Line Segment

Contains two endpoints

Interior point

The inner most point

Angle

A union of two rays that have a common endpoint (vertex)

Right Angle

An angle at 90 degrees

Obtuse Angle

An angle that is greater than 90 degrees

Acute Angle

An angle that is less than 90 degrees

Straight Angle

An angle that is 180 degrees

Reflex Angle

An angle that is greater than 180 but less than 360

Adjacent Angles

Share a vertex and a side that does not intersect

Vertical Angles

Non-Adjacent angles that are formed by two intersecting lines

Congruent Angles

Angles the same measure of degrees

Linear Angles

Adjacent angles that form a straight line

Complimentary Angles

two angles whose sum equals 90 degrees

Supplementary Angles

Two angles whose sum equals 180

Transversal

A line that intersects two or more lines in a plane