Pour all your formulas here and let this thread be only for formulas to make things easier for us :
Area, Surface area and Volume
Rectangle:
Area = lw
Perimeter = 2l + 2w
Parallelogram:
Area = bh
Triangle
Area = 1/2 of the base X the height = 1/2 bh
Perimeter = a + b + c
Trapezoid
Perimeter = P = a + b1 + b2 + c
Circle:
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)
d = 2r
c = pd = 2 pr
A = pr2
(p=3.14)
Rectangular Solid
Volume = lwh
Surface = 2lw + 2lh + 2wh
Prisms
Volume = Base area X Height
Surface = 2b + Ph (b is the area of the base P is the perimeter of the base)
Cylinder
Volume = pr2 h
Surface = 2prh
Pyramid
V = 1/3 bh
b is the area of the base
Surface 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.
Cones
Volume = 1/3 pr2 x height = 1/3 pr2h
Surface = pr2 + prs = pr2 + pr
Sphere
Volume = 4/3 pr^3
Surface area = 4pr^2
Area, Surface area and Volume
Rectangle:
Area = lw
Perimeter = 2l + 2w
Parallelogram:
Area = bh
Triangle
Area = 1/2 of the base X the height = 1/2 bh
Perimeter = a + b + c
Trapezoid
Perimeter = P = a + b1 + b2 + c
Circle:
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)
d = 2r
c = pd = 2 pr
A = pr2
(p=3.14)
Rectangular Solid
Volume = lwh
Surface = 2lw + 2lh + 2wh
Prisms
Volume = Base area X Height
Surface = 2b + Ph (b is the area of the base P is the perimeter of the base)
Cylinder
Volume = pr2 h
Surface = 2prh
Pyramid
V = 1/3 bh
b is the area of the base
Surface 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.
Cones
Volume = 1/3 pr2 x height = 1/3 pr2h
Surface = pr2 + prs = pr2 + pr
Sphere
Volume = 4/3 pr^3
Surface area = 4pr^2
Thu Aug 20, 2015 2:24 pm by vigneshwaran0812
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