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Georgia Coordinate Algebra Formula Sheet Milestones Below are the formulas you may find useful as you work the problems. However, some of the formulas may not be used. You may refer to this page as you take the test. Area Mean Absolute Deviation n Rectangle and Parallelogram A = bh Triangle i =1 |x −x| i n Circle A = πr2 Trapezoid A = 1 ( h ) ( b1 + b2 2 ) Circumference C = πd å 1 A = bh 2 the average of the absolute deviations from the mean for a set of data Distance Formula d = ( x 2 − x1 )2 + ( y2 − y1 )2 π ≈ 3.14 Volume Rectangular Prism/Cylinder V = Bh Slope Formula 1 m= Pyramid/Cone V = Bh 3 4 3 Sphere V = πr 3 Surface Area Rectangular Prism SA = 2lw + 2wh + 2lh Cylinder SA = 2πr2 + 2πrh Pythagorean Theorem a2 + b2 = c2 y2 − y1 x 2 − x1 Midpoint Formula M= x1 + x 2 y1 + y2 , ( 2 2 ) Interquartile Range and third quartile of a set of data Copyright © 2014 Georgia Department of Education 2706768