# 816 Math Blog (2011)

This is a place for the community of learners in Room 8-16 to learn and enjoy math. It is an extension of the classroom making it accessible 24 hours a day, 7 days a week.

## Thursday, March 22, 2012

### Volume Post

### 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

3.14x6x6x15

= 1695.6cm3

### Natasha's surface area volume

(bxh÷2)xh

5x3=15m =7.5m

7.5x8.5=63.75m

7.5x8.5=63.75m

^{3AOBxhlxwxh8x20x16=2560cm3(bxh÷2)xh4x8÷2x6.54x8=32÷2=1616x6.5=104cm3v=πrxhv=( 3.14x6x6)x15v=113.04x15v=1695.6cm3}^{ }

## 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= 280cm

Triangular Prism

lxw

5x10= 50

5x9= 45

5x8= 40

bxh

2

9x8= 36

2

9x8= 36

2

TSA= 50+45+40+36+36

TSA= 207cm

Cylinder

SA= 2(3.14x4

SA= 100.48+301.44

SA= 401.92cm

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(6

v= 3.14(540)

v= 1695.6cm3

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= 280cm

^{2}Triangular Prism

lxw

5x10= 50

5x9= 45

5x8= 40

bxh

2

9x8= 36

2

9x8= 36

2

TSA= 50+45+40+36+36

TSA= 207cm

^{2}Cylinder

SA= 2(3.14x4

^{2})+(3.14x8x12)SA= 100.48+301.44

SA= 401.92cm

^{2}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(6

^{2}x15)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=

63.75m

^{3}

rectangular prism:

l x w x h

20 x 8 x 16=

2560cm

^{3}

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

104cm

^{3}

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

1695.6cm

^{3}

## 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 m

^{2)}^{ }TSA=

^{ }280 m

^{2}

L x W

10 x 5= 50

9 x 5=45

8 x 5= 40

B x H

-------

÷2

9 x 8 = 72 ÷ 2 = 36m

^{2}9 x 8 = 72 ÷ 2 = 36m

^{2}=2 (T+F+S)

=2(50+45+40+36+36)

=207m

^{2}r= d ÷ 2 Circumference L x W

r=8 ÷ 2 c= π d 25.12 x 12= 301.44cm

^{2}r=4cm c= 3.14 x 8

c= 25.12m

^{2}A= πr TSA = circle+circle+rectangle

A=3.14 x4 x4 TSA =50.24+50.24+301.44

A=50.24 cm

^{2 TSA= 404.92 }cm^{2 }^{ }

^{}

AOB. h

b.h.h

-----

2

(5.3)8.5

--------

2

(15)8.5

--------

2

7.5 . 8.5=63.75cm

^{3}l.w.h

16x8x20=2,560cm

^{3}20x8x16=2,560cm

^{3}8x16x20=2,560cm

^{3}B.h.h

------

2

11. 8 . 6.5

-----------

2

208

------

2

104

-----

8

13 . 3= 39cm

^{3}d=r

2

12=r

-----

2

6=r

v= (3.14 . 6 . 6) 15

= 113.04 . 15

= 1,695.6cm

^{3}
Subscribe to:
Posts (Atom)