## Thursday, March 22, 2012

### chelese's surface area post

BxH  xH    3x8x5x5      = 127.5
2                  2                     2
= 63.75m3

lxwxh
20x8x16= 2560cm3

BxH  xH
2
= 4x8  x 6.5= 104cm3
2

Vo= π r2 xH
3.14x6x6x15
= 1695.6cm3

(bxh÷2)xh
5x3=15m =7.5m
7.5x8.5=63.75m3

AOBxh
lxwxh
8x20x16=2560cm3

(bxh÷2)xh
4x8÷2x6.5
4x8=32÷2=16
16x6.5=104cm3

v=πrxh
v=( 3.14x6x6)x15
v=113.04x15
v=1695.6cm
3

## Wednesday, March 21, 2012

### Jamodin's Surface Area and Volume Post

Surface Area
Rectangular Prism
T= 50 5x10
F= 60 6x10
S= 30 6x5
TSA= 2(T+F+S)
TSA= 2(50+60+30)
TSA= 2(140)
TSA= 280cm2

Triangular Prism
lxw
5x10= 50
5x9= 45
5x8= 40

bxh
2
9x8= 36
2
9x8= 36
2
TSA= 50+45+40+36+36
TSA= 207cm2

Cylinder
SA= 2(3.14x42)+(3.14x8x12)
SA= 100.48+301.44
SA= 401.92cm2

Volume
Triangular Prism
v= 5x3 x 8.5
2
v= 7.5x8.5
v= 63.75cm3

Rectangular Prism
v= 20x8x16
v= 2560cm3

Triangular Prism 3/8 full
v= 4x8 x 6.5
2
v= 14x6.5
v= 91x0.375
v= 34.125cm3

Cylinder
v= 3.14(62x15)
v= 3.14(540)
v= 1695.6cm3

## Monday, March 12, 2012

### Jomel's Surface Area and Volume Post

Volume:

Triangular prism:
b x h x h divided by 2
5 x 3 x 8.5 divided by 2
15 x 8.5 divided by 2
7.5 x 8.5=
63.75m3

rectangular prism:
l x w x h
20 x 8 x 16=
2560cm3

right triangular prism:
b x h x h divided by 2
4 x 8 x 6.5 divided by 2
32 x 6.5 divided by 2
16 x 6.5
104cm3

cylinder:
r=d divided by 2
12 divided by 2
6cm
pi x r x r h
3.14 x 6 x 6 x 15
3.14 x 36 x 15
1695.6cm3

## Sunday, March 11, 2012

### Sarah's Surface Area and Volume Post

Here is a LINK you can that will help you understand about finding the area of a rectangular prism, triangular prism, and cylinder.

~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.~.

### Carlo's Surface Area and Volume Post

T=10 x 5= 50 =2 (T+F+S)
F=5 x 6= 30 = 2(50+30+60)
S=10 x 6= 60 = (140 m2)
TSA= 280 m2

L x W
10 x 5= 50
9 x 5=45
8 x 5= 40

B x H
-------
÷2

9 x 8 = 72 ÷ 2 = 36m2
9 x 8 = 72 ÷ 2 = 36m2

=2 (T+F+S)
=2(50+45+40+36+36)
=207m2

r= d ÷ 2 Circumference L x W
r=8 ÷ 2 c= π d 25.12 x 12= 301.44cm2
r=4cm c= 3.14 x 8
c= 25.12m2

A= πr TSA = circle+circle+rectangle
A=3.14 x4 x4 TSA =50.24+50.24+301.44
A=50.24 cm2 TSA= 404.92 cm2

AOB. h

b.h.h
-----
2
(5.3)8.5
--------
2
(15)8.5
--------
2
7.5 . 8.5=63.75cm3

l.w.h
16x8x20=2,560cm3
20x8x16=2,560cm3
8x16x20=2,560cm3

B.h.h
------
2
11. 8 . 6.5
-----------
2
208
------
2
104
-----
8
13 . 3= 39cm3
d=r
2
12=r
-----
2
6=r

v= (3.14 . 6 . 6) 15
= 113.04 . 15
= 1,695.6cm3