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anonymous
 one year ago
need help
anonymous
 one year ago
need help

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mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.1The front and back faces are triangles. What6 is the area of a triangle with base 6 and height 2? dw:1439845523581:dw

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.1Area of triangle = base * height / 2 What is 6 * 2 / 2 = ?

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.1Correct. There are a front face and a back face, each with area 6, so from the front and back faces we have an area of 2 * 6 = 12

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.1Now we have three rectangles. The bottom rectangle has sides 2 and 6 What is the area of a rectangle with sides 2 and 6?

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.1dw:1439846034210:dw

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.1Great. So far we have: Front & back faces 12 Bottom face 12 Now we need the right face. It's a rectangle 2 by 4. dw:1439846273340:dw

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.1Great. So far we have: Front & back faces 12 Bottom face 12 Right face 8 One more face. The left face. It's a rectangle 3 by 2. dw:1439846420666:dw

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.1Great again. Now we have: Front & back faces 12 Bottom face 12 Right face 8 Left face 6  Total Add all the areas above to find the total surface area of the prism.

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.1Somehow you double it. 12 + 12 + 8 + 6 = = 24 + 8 + 6 = 32 + 6 = 38
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