•
###
Point

An exact location in space

•
###
Line

A straight path of points that goes on and on in two directions

•
###
Line Segment

A part of a line-it has two endpoints

•
###
Ray

A part of a line-it has one endpoint and continues on and on in only one direction

•
###
Angle

Formed by two rays that have the same endpoint

•
###
Vertex

The point where two rays meet OR where the sides of a polygon meet OR the point where three or more edges of a solid figure meet

###
Right Angle

An angle that forms a square corner at 90 degrees

###
Acute Angle

An angle that is less than a right angle (less than 90 degrees)

###
Obtuse Angle

An angle that is greater than a right angle (greater than 90 degrees)

###
Parallel Lines

In a plane, lines that never intersect

###
Intersecting Lines

lines that pass through the same point

###
Perpendicular Lines

Two lines that intersect to form right angles

### Flickr Creative Commons Images

Some images used in this set are licensed under the Creative Commons through Flickr.com. Click to see the original works with their full license.