## Friday, March 5, 2010

### Princesss' Surface Area Growing Post

Rectangular Prism:

Rectangular Prism net:

Formula:
A=LxW
A=_x_ (plug in the numbers)
A=__cm

TSA=S1+S2+S3
TSA=_+_+_
TSA=__

Solution:

Triangular Prism:

Triangular Prism net:

Formula:
A=LxW
A=_x_ (plug in the numbers)
A=__cm (2)

A=bxh/2
A=_x_/2
A=__/2
A=__cm(2)

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

Solution:

Cylinder:

Cylinder net:

Formula:
Since you will be needing the length of the circle, you should find it first by finding the circumference of the circle, because they are always equal.

C=πd
C=3.14x_
C=__

Next you will need the area of the circle, meaning you will need the radius, so find the radius of the circle.

r=d/2
r=_/2
r=__

Now that you have the radius of a circle, you can find the area of the circle.
A of circle=3.14xrxr
A of circle=3.14x_x_
A of circle=__cm(2)

Now find the Lateral Area of the square.
L.A.=L (circumference of the circle) xW
L.A.=_x_
L.A.=__cm

TSA=circle+circle+L.A.
TSA=_+_+_
TSA=__cm(2)

Solution:

Video: