Thursday, March 18, 2010

Noel's Growing post

The measurements : Radius of the circle are 5cm, Circumference is 12 cm and the lines are 22cm


The formula's for finding the surface area of a cylinder are

The surface area of a cylinder is the sum of the areas of its faces.

S.A. = 2 × (π × r2) + (π × d × h) or to shorten this it could be S.A.= 2πr2 + πdh To solve it I will use the formula S.A.=2x3.14x25 + 3.14x 10x

Triangular Prism

Then you add them all together and you get 141 cm2
The formulas for a triangular prism are: LXW and BXH divided by 2.

Rectangular prism

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