katlin95
find the surface area of the figure.
A. 19.21 cm^2
B. 10.37 cm^2
C. 34.85 cm^2
D. 6.29 cm^2



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katlin95
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@jim_thompson5910 please help?

katlin95
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dw:1364868506696:dw

katlin95
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sorry this is a very bad drawing,, but can I please get some help?

katlin95
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@e.cociuba


katlin95
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can you give me the solution to solve?

jim_thompson5910
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what's the area of the base

katlin95
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1.7

katlin95
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or 3.4

jim_thompson5910
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1.7 is the length of the side of the square

jim_thompson5910
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(1.7)^2 = ???

katlin95
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2.89

jim_thompson5910
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what is the area of each triangular piece

katlin95
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8.29?

jim_thompson5910
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how did you get that?

katlin95
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I added all sides

jim_thompson5910
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Area of triangle
A = (b*h)/2
A = (4.8*1.7)/2
A = ???

jim_thompson5910
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I recommend writing down each area and perimeter formula on a note sheet so you can look them up quickly

katlin95
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4.08

jim_thompson5910
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good, now multiply that by 4
afterwards, add that to 2.89

katlin95
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19.21

jim_thompson5910
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perfect

katlin95
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yay!

jim_thompson5910
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you got 16.32 for the lateral surface area
2.89 was the base area

katlin95
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ohh okai

jim_thompson5910
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so
total surface area = base area + lateral surface area
total surface area = 2.89 + 16.32
just summing things up (you probably already know by now)