Supplementary Angles
Supplementary angles are two angles whose sum is 180 degrees while
complementary angles are two angles whose sum is 90 degrees.
Pythagorean Theorem
Pythagoras's theorem is a fundamental relation among the three sides
of a right triangle. It states that the area of the square whose side is the
hypotenuse is equal to the sum of the areas of the squares on the
other two sides.