In math we are learning different kind of Angles. an acute angle is measured less than 90 degrees, a right angle is always 90 degrees, a obtuse angle angle measures between 90 and 180 degrees, A straight angle measures 180 degrees, A reflex angle measures between 18 and 160 degrees. In todays class we learned that a complementary angle is 90 degrees, and supplementary angles had up to 180 degrees.