MASCO Catalog: Concrete Forming & Accessories

245 MASONS SUPPLY COMPANY Oregon (800) 537-3407 ♦ Washington (800) 537-6216 Clackamas | Eugene | West Eugene | Hillsboro | Medford | Portland | Salem | Ridgefield | Seattle | Tacoma | Woodinville M A S C O . N E T GENERAL & TECH INFO CHARTS Engineering Data FORMULAS Area of a square = length x breadth or height. Area of a rectangle = length x breadth or height. Area of a triangle = base x ½ altitude. Area of parallelogram = base x altitude. Area of trapezoid = altitude x ½ the sum of parellel sides. Area of trapezium = divide into two triangles, total their areas. Circumference of circle = diameter x 3.1416. Circumference of cirle = radius x 6.283185. Diameter of circle = circumference x .3183. Diameter of circle = square root of area x 1.12838. Radius of circle = circumference x .0159155. Area of a circle = half diameter x half circumference. Area of a circle = square of diameter x .7854. Area of a circle = square of circumference x .07958. Area of a sector of circle = length of arc x ½ radius. Area of a segment of circle = area of sector of equal radius- area of a triange, when the segment is less, and plus area of triangle, when segment is greater than the semi-circle. Area of circular ring = sum of the diameter of the two circles x difference of the diameter of the two circles and that product x .7854. Side of square that shall equal area of circle = circumference x .2821. Diameter of circle that shall contain area of a given square = side of square x 1.1284. Side of inscribed equilateral triange = diameter x .86. Side of inscribed square = diameter x .7071. Side of inscribed square = circumference x .225. Area of ellipse = product of the two diameters x .7854. Area of a parabola = base x ⅔ of a altitude. Area of a regular polygon = sum of its sides x perpendicular from its center to one of its sides divided by 2. Surface of sphere = diameter x circumference. Solidity of sphere = surface x 1/6 diameter. Solidity of sphere = cube of diameter x .5236. Solidity of sphere = cube of radius x 4.1888. Solidity of sphere = cube of circumference x .016887. Diameter of sphere = cube root of solidity x 1.2407. Diameter of sphere = square root of surface x .56419. Circumference of sphere = square root of surface x 1.772454. Circumference of sphere = cube root of solidity x 3.8978. Contents of segment of sphere = (height squared plus three times the square of radius of base) x (height x .5236). Side of inscribed cube of sphere = radius x 1.1547. Side of inscribed cube of sphere = square root of diameter. Contents of pyramid or cone = area of base x ⅓ altitude. Contents of frustum or pyramid or cone = multiply areas of two ends together and extract square root. Add to this root the two areas and x ⅓ altitude. Contents of a wedge = area of base x ⅛ altitude.