Finding the perimeter of an object? - Answers

It depends what geometric shape the object is.ShapesFormulaRectangle:Area = Length X WidthA = lwPerimeter = 2 X Lengths + 2 X WidthsP = 2l + 2wParallelogramArea = Base X Heighta = bhTriangleArea = 1/2 of the base X the heighta = 1/2 bhPerimeter = a + b + c(add the length of the three sides)TrapezoidPerimeter = area + b1 + b2 + cP = a + b1 + b2 + cCircle Try the Online tool.The distance around the circle is a circumference. The distance across the circle is the diameter (d). The radius (r) is the distance from the center to a point on the circle. (Pi = 3.14) More aboutcircles.d = 2rc = pd = 2 prA = pr2(p=3.14)Rectangular SolidVolume = Length X Width X HeightV = lwhSurface = 2lw + 2lh + 2whPrismsVolume = Base X Heightv=bhSurface = 2b + Ph (b is the area of the base P is the perimeter of the base)CylinderVolume = pr2 x heightV = pr2 hSurface = 2p radius x heightS = 2prh + 2pr2PyramidV = 1/3 bhb is the area of the baseSurface Area: Add the area of the base to the sum of the areas of all of the triangular faces. The areas of the triangular faces will have different formulas for different shaped bases.ConesVolume = 1/3 pr2 x heightV= 1/3 pr2hSurface = pr2 + prsS = pr2 + prs=pr2 + prSphereVolume = 4/3 pr3V = 4/3 pr3Surface = 4pr2S = 4pr2