An angle is formed by two RAYS with a common endpoint called the VERTEX.
The rays are called the SIDES ofthe angle.
An angle is named with three letters, the middle letter must always be the vertex.
Acute angles measure between 0 and 90 degrees
Right angles = 90 degrees
Obtuse angles measure between 90 and 180 degrees
Two angles that have a common side and a common endpoint and DO NOT OVERLAP are called ADJACENT angles.
A ray that divides an angle into two CONGRUENT angles is said to BISECT the angle. This ray is also called an ANGLE BISECTOR.
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I have a math website
ReplyDeletehttp://player.discoveryeducation.com
Type in your topic such as pi or circle and watch the video.
3.141592653597... that's all I remember
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