What’s the deal with angles anyway?
Degree. One-three-hundred-and-sixtieth of the circumference of a circle. It is also the unit by which we measure angles.
Angle. This is the space between two intersecting lines.
Complementary angles. These are two angles whose sum equals 90 degrees.
Supplementary angles. These are two angles whose sum equals 180 degrees.
Acute angle. An angle that is less than 90 degrees.
Obtuse angle. An angle that is greater than 90 degrees.
Similar angles. It is possible for triangles to each have different sized sides but share the same sized angles. These are called similar angles.
Right angle. This is an angle that is 90 degrees.