|
Angles and Lines
|
Page 3 of 13
|
 |
|
Angle Basics
|
An angle is the space or opening between a pair of intersecting lines, called rays. The rays extend from a common point called the vertex.
An angle is formed when two rays extend from the same point: the vertex. Angles are measured in degrees.
The bigger the angle, the more "open" it is. If an angle were fully open, it would measure 360°.
 |
Tip
There are three angle measurements to keep in mind: 360°, 180°, and 90°.
|
|
Here is a picture of the "angle basics."
|
Tip
90° is also known as a right angle. This means that the corner formed is square. One line is perpendicular to the other even though one may not cross the other. 180° could be called a line or ray. A line extends indefinitely in both directions, but a ray begins at one point and extends in only one direction. 360° is a complete circle. To travel 360° is to return to your starting point.
|
|
|
|
|
 |
|
|
Copyright © 2001 Center for the Application of Information Technologies. All rights reserved.
|
|
|
