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