Matching Pairs Geometry Formulas (D)Online version 7th grade geometry by STEPHANIE GREGORY 1 Supplementary Angles 2 SSS 3 Vertical Angles 4 Circumference of a Circle 5 Complementary Angles 6 Volume of a rectangular prism 7 Area of a rectangle or square 8 AAA 9 Circumference of a semi-circle 10 Area of a triangle 11 Area of a semi-circle 12 Area of a Circle 13 Volume of a triangular prism length x width 1/2 x pi x diameter a + b > c Pi x diameter 2 or more angles that equal 180 degrees because together they form a straight line. all angles together = 180 degrees 1/2 x pi x radius squared 2 or more angles that have a sum of 90 degrees because together they form a right angle 1/2 x base x height 1/2 x base x height x height Angles that are on opposite sides of the figure. They are equivalent. length x width x height Pi x radius squared