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