Right Angle An angle of exactly 90 degrees
Acute Angle An angle less than 90 degrees
Acute Angle An angle less than 90 degrees
Obtuse Angle An angle greater than9 degrees
Straight Angle An angle of 180 degrees
Resources for angles
Measuring and classifying angles
Includes a helpful video on measuring angles and lots of pictures.
Angle Worksheets
A great resource for many free worksheets covering angles.
Ray A portion of a line with a beginning point and then travels forever in the opposite direction.
Ray Resource
Helpful manipulative in order to help you visualize a ray.
Complementary and Supplementary Angles
Resources Complementary and Supplementary Angles
Math is Fun-Complementary Angles
Great pictures and manipulatives to help understand these types of angles.
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