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I need to find some triangular prisms so students can practice measuring figures for surface area. The only company that I know of that makes that shape is Toblerone. I checked their website but couldn't find a way to contact the company to ask for empty boxes. Does anyone know of a company or place where I could get some triangular prisms to use in my classroom? I really don't need small wood block ones, my school has those. I need larger ones that would be easier for students to measure. Thanks!
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