Angles

The opening that is formed when 2 lines, rays, or segments intersect.
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Pictures of angles. acute, obtuse, right angles, and straight angle are above.

Video on Angles


A better description of Angles
Measuring Angles Activity

Activity for Angles

Activity on Angles

Another Angle vid.
Type of Angle
Description

Acute Angle
an angle that is less than 90°
Right Angle
an angle that is 90° exactly
Obtuse Angle
an angle that is greater than 90° but less than 180°
Straight Angle
an angle that is 180° exactly
Reflex Angle
an angle that is greater than 180°