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A tetrahedron is a polyhedron consisting of four equilateral triangles.

A tetrahedron is a polyhedron consisting of four equilateral triangles.-example-1
User Mike Wade
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1 Answer

6 votes

Answer:

the second one

Explanation:

because if you think it how it folds the second one doesnt form a tetrahedron.You can try it by drawing it in a letter then cutting it to see which forms a shape and which doesnt.

User Om Prakash Sharma
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