Pour all your formulas here and let this thread be only for formulas to make things easier for us :

Area = lw

Perimeter = 2l + 2w

Area = bh

Area = 1/2 of the base X the height = 1/2 bh

Perimeter = a + b + c

Perimeter = P = a + b1 + b2 + c

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)

Volume = lwh

Surface = 2lw + 2lh + 2wh

Volume = Base area X Height

Surface = 2b + Ph

Volume = pr2 h

Surface = 2prh

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.

Volume = 1/3 pr2 x height = 1/3 pr2h

Surface = pr2 + prs = pr2 + pr

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

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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