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

Natasha's surface area volume

(bxh÷2)xh

5x3=15m =7.5m
7.5x8.5=63.75m<sup>3











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=1695.6cm3</sup>

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.

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

JM's Surface Area and Volume Post

Rectangular Prism


T=10 x 5 = 50
F= 10 x 6 = 60
S= 5 x 6 = 30

TSA = 2(T+F+S)
2 (50+60+30)
2 = (140)
TSA = 280 m²

Triangular Prism

l x w

10 x 5 = 50

9 x 5 = 45

8 x 5 = 40

b x h ÷ 2

9 x 8 = 72 ÷ 2 = 36

9 x 8 = 72 ÷ 2 = 36

36 + 36 = 72

TSA = 50+45+40+72

= 207 cm ²

^Cylinder

d÷2 = r

8 ÷ 2 = r

4 = r

c = π d

= 3.14 x 8

= 25.12 cm

lxw

12 x 25.12 = 301.44 cm

@ = π r2

= 3.14 x 4 x 4

= 50.24 cm

TSA = circle + circle + rectangle

= 50.24 + 50.24 + 301.44

= 401.92 cm2

Volume

1. Triangular Prism

v= bxh divided by 2 x h2

5x3= 15 divided by 2 = 7. 5

7.5 x 8.5 = 63.75cm3

2. rectangular prism

v = l x w x h

20 x 8 x 16 = 2560

3. Triangular prism 3 eighths

bxh divided by 2 x h

4 x 8 divided by 2 = 16

16 x 6.5 = 104cm3

104 divided by 8 = 13 x 3 = 39cm3

4. Cylinder

r = diameter divided by 2 r = 12 divided by 2 = 6

Pi x r x r x h

3.14 x 6 x 6 x 15

= 1695.6cm3

Madeline's Surface Area and Volume Post

Surface Area

Rectangular Prism:

1.
TSA = LW2 + LA*
TSA = 5 x 6 x 2 + 22 x 10
TSA = 60 + 220
TSA = 280m²

*Lateral Area

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

Triangular Prism:

1.
TSA = LA + b x h¸ 2 x 2
TSA = 27 x 5 + 9 x 8 ¸ 2 x 2
TSA = 135 + 72 ¸ 2 2 x 2
TSA = 135 + 36 x 2
TSA = 135 + 72
TSA = 207cm²
2.
TSA = rectangle + rectangle + rectangle + triangle + triangle

TSA = 5x8 + 5x10 + 5x9 + 9x8 ¸ 2 + 9x8 ¸ 2

TSA = 40 + 50 + 45 + 72 ¸ 2 + 72 ¸ 2

TSA = 40 + 50 + 45 + 36 + 36

TSA = 207cm²

Cylinder:

1.

TSA = 2πr² + πdh

TSA = 2 x 3.14 x 4 x 4 + 3.14 x 8 x 12

TSA = 2 x 3.14 x 16 + 3.14 x 96

TSA = 2 x 50.24 + 301.44

TSA = 401.92mm²TSA = 100.48 + 301.44

2.

TSA = rectangle + circle + circle

TSA = 301.44 + 50.24 + 50.24

TSA = 401.92 mm²

Quiz

Surface Area of a Cube:

Volume

Triangular Prism:
(b x h/2) x h
(5 x 3/2) x 8.5
(15/2) x 8.5
7.5 x 8.5
63.75m³

Rectangular Prism:
l x w x h
20 x 8 x 16
160 x 16
2560cm³

3/8 of the triangular prism:
(b x h/2) x h
(4 x 8/2) x 6.5
(32/2) x 6.5
16 x 6.5
104cm³
104 divided by 8 = 13
13 x 3 = 39cm³

Cylinder:
πr² x h

3.14 x 6 x 6 x 15

3.14 x 36 x 15

113.04 x 15

1695.6cm³

Sarissa's Surface Area and Volume Post

Rectangular Prism
Area of a rectangle: l x w


Triangular Prism
Area of a triangle: bxh/2

Cylinder

bxh/2
3x5/2 x 8.5
15/2 x 8.5
7.5 x 8.5=
v= 63.75m³








lxwxh
20x8x16=
v= 2560cm³









bxh/2 xh
8x4/2 x 6.5
32/2 x 6.5
16x6.5
=104cm³
104/8=13
13x3
v=39cm³


πr² xh
3.14x6x6x15=
r=d/2 v=1695.6cm³
r=12/2
r= 6cm