Common formulas used in Math and Science. Grades: 9 10 11 12 Subjects: Mathematics Formulas and Functions ADD TO FAVORITES Add to Folder creative writing children's book activities classroom tools language arts and writing vocabulary Create new folderCREATE NEW FOLDER Print Circumference Circle: C = d, in which is 3.1416 and d the diameter.Area Triangle: A = (ab)/2 , in which a is the base and b the height. Square: A = a2, in which a is one of the sides. Rectangle: A = ab, in which a is the base and b the height. Trapezoid: A = (h(a + b))/2, in which h is the height, a the longer parallel side, and b the shorter. Regular pentagon: A = 1.720a2, in which a is one of the sides. Regular hexagon: A = 2.598a2, in which a is one of the sides. Regular octagon: A = 4.828a2, in which a is one of the sides. Circle: A = r2, in which is 3.1416 and r the radius.Volume Cube: V = a3, in which a is one of the edges. Rectangular prism: V = abc, in which a is the length, b is the width, and c the depth. Pyramid: V = (Ah)/3, in which A is the area of the base and h the height. Cylinder: V = r2h, in which is 3.1416, r the radius of the base, and h the height. Cone: V = (r2h)/3, in which is 3.1416, r theradius of the base, and h the height. Sphere: V = (4r3)/3, in which is 3.1416 and r the radius.Temperature ScalesDegrees Fahrenheit to Degrees Celsius:TC = 5/9 (TF 32)Degrees Celsius to Degrees Fahrenheit:TF = 9/5 TC + 32Degrees Celsius to Kelvin:TK = TC + 273.15Miscellaneous Distance in feet traveled by falling body: d = 16t2, in which t is the time in seconds. Speed of sound in feet per second through any given temperature of air: take the square root of (273 + t), in which t is the temperature Centigrade, multiply it by 1087, and divide the result by 16.52. Cost in cents of operation of electrical device: C = (Wtc)/1000, in which W is the number of watts,t the time in hours, and c the cost in cents per kilowatt-hour. Conversion of matter into energy (Einstein's Theorem): E = mc2, in which E is the energy in ergs, m the mass of the matter in grams, and c the speed of light in centimeters per second: (c2 = 9 × 1020)
