Angles
Learn about angles!
Acute Angle
An acute angle has a measure of less than 90 degrees.
Right Angle
A right angle has a measure of 90 degrees.
Obtuse Angle
An obtuse angle has a measure of more than 90 degrees, and less than 180 degrees.
Straight Angle
A straight angle has a measure of 180 degrees.
Complementary Angles
Complementary angles are two angles that add up to 90 degrees.
Supplementary Angles
Supplementary angles are two angles that add up to 180 degrees.