Posted by Brett on Thursday, May 20, 2010 at 5:12pm.
Is the triangular cross section equilateral? It is for most triangular prisms.
If the triangle is equilateral, it seems to me they have provided too much information. If it is scalene, there is not enough information.
You know that the length or "height" of the prism is 10 inches and the triangle height is 6 inches (or 14 inches). The triangle cross section is 360/10 = 36 square inches. The base of the triangle is
2(Area)/(triangle height) = 72/6 = 16 in.
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