Tuesday, March 2, 2010

Sierra's Surface Area Growing Post

Rectangular Prism

* Draw a Rectangular Prism

* Draw its net.
* List all measurements on the drawing and on the net.

* What formulas do you use to calculate surface area?
The formula to find the area of a rectangle, you follow these steps:
L X W = a
_ x _ = a
_ units = a
TSA=S1+S2+S3+S4+S5+S6
TSA=__

* Calculate the surface area of your rectangular prism.

TSA= 24+24+30+30+20+20
TSA= 148cm²

Triangular Prism

* Draw a Triangular Prism

* Draw its net.
* List all measurements on the drawing and on the net.
* What formulas do you use to calculate surface area?
* Calculate our the surface are of your triangular prism.
A=LxW
A=_x_
A=__cm
²

A=bxh
÷2
A=_x_
÷2
A=__
÷2
A=__cm²

TSA=S1+S2+S3+S4+S5
TSA=_+_+_+_+_
TSA=__cm
²

Cylinder

* Draw a Cylinder Prism
* Draw its net.
* List all measurements on the drawing and on the net.
* What formulas do you use to calculate surface area?
* Calculate our the surface are of your cylinder prism.
To find the circumference of the circle:
C=πd
C=3.14 × _
C=__

A of ° =3.14 × r × r
A of ° =3.14 × _ × _
A of ° =__cm²

Now to find the Lateral Area of the circle, you:
LA=L x W
LA=_ x _
LA= __cm

TSA= ° + ° + LA
TSA= _ + _ +
TSA= __cm²