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