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1. A piece for a board game is shaped like a triangular prism. The piece is 18mm long, and the base of the piece is an equilateral triangle with side lengths 10mm and 9mm. Find the surface area of the piece. 

 May 1, 2018
 #1
avatar+988 
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Hi Ant. 

 

I just have a quick question, 

 

In the second part of the question, you said that the equilateral triangle has a side length of 10 and 9.

 

How can this be possible?

 May 1, 2018
 #2
avatar+874 
+2

Hmm, width=10, length=9? I forget, I will tell you tomorrow. 

 May 2, 2018

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