Question #2

Calculate the serface are of each rectangular prism to the nearest tenth of a centimetre squared.

a)

11.5 x 3.2 = 36.8

11.5 x 3.2 = 36.8

11.5 x 5 = 57.5

11.5 x 5 = 57.5

3.2 x 5 = 16

3.2 x 5 = 16

36.8 + 57.5 + 16 = 110.3

110.3 x 2 = 220.6

T.S.A = 220.6

b)

12 x 10.4 = 124.8

12 x 10.4 = 124.8

12 x 4.5 = 54

12 x 4.5 = 54

10.4 x 4.5 = 46.8

10.4 x 4.5 = 46.8

124.8 + 54 + 46.8 = 225.6

225.6 x 2 = 451.2

T.S.A = 451.2

Question #3

Find the surface area of each triangular prism to the nearest tenth of a centimetre squared.

a)

7 x 2.5 = 17.5

8 x 2.5 = 20

10.6 x 2.5 = 26.5

8 x 7 = 56 /2 = 28

8 x 7 = 56 /2 = 28

17.5 + 20 + 26.5 + 28 +28 = 120

T.S.A = 120 cm squared.

b)

L x W/2 L x W

8 x 4.5 = 36

8 x 4.5 = 36

8 x 4.5 = 36

3.35 x 6 = 20.1 /2 = 10.05

3.35 x 6 = 20.1 /2 = 10.05

36 + 36 + 36 + 10.05 + 10.05 =128.1

T.S.A = 128.1

Question #4

Ty is painting this storage bench for the deck. How much area does he need to paint, to the nearest hundreth of a square metre?

LxW 0.5 x 1.56 = 0.78

0.5 x 1.56 = 0.78

0.5 x 1.56 = 0.78

0.5 x 1.56 = 0.78

0.5 x 0.38 = 0.19

0.5 x 0.38 = 0.19

0.78 x 4 = 3.12

0.19 x 2 = 0.38

0.38 + 3.12 =

T.S.A = _______

Here is a link that I found! *click here*

Also Here`s a video I found! Check it out

Good job Breanna. I liked the video you chose to include in your post. I realized for the area of a triangle you had LxW/2 but it is bxh/2. Great job!

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