Monday, April 7, 2008

Surface Area Scribe Post

-- Rectangular Prism
-- The Net


-- Top && Bottom
area of Top && Bottom = (Lxw)+(Lxw)
= 2 (Lxw)



-- Front && Back

area of Front && Back = (hxL) + (hxL)
= 2 (hxL)

-- Sides



area of the sides = (hxw) + (hxw)
= 2 (hxw)

-- Surface Area :

8+8=
2x8=
2(8)
area = 2(Lxw) + 2(hxL)+2(hxw)



-- Solve Surface Area

h=30cm
L=20cm
w=10cm


400 (2) + 1200(2) + 600(2)
= 2200cm(2)



-- Example Question :


-- The Net (for the example question)

-- Answer (Surface Area) :

= 2(Lxw)+ 2(hxL) + 2 (hxw)
= 2 (17cm+5cm) + 2(17cm+7cm)+ 2(17cm+5cm)
= 2x35cm(2) + 2x119cm(2)+2x85cm(2)
= 70cm(2) + 238cm(2) + 170cm(2)
=478cm(2)

8 comments:

Mr. Jerema said...
This comment has been removed by the author.
Mr. Jerema said...

Chelsey your diagrams and nets are great. I could not have been more clear myself. Thanks!

spmath said...

great job chelsey!your drawings/diagrams and explainations were very clear!-Karla

Michael Jordan 873 said...

great job, your diagram and explanation are nice.

Jenna 8-73 said...

nice job on your scribe post ! :)

mariya 873 said...

nice job. i really like your diagrams. they're very understandable.

Jann 8-73 said...

Very nice explaining what a rectangular prism and what a net is. I also like your Diagrams, it helps make your explaination more clear and understandable

Kadille Dave 8-73 said...

great job...the lines were represented niely