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16 votes
A tetrahedron is a polyhedron consisting of four equilateral triangles.

A tetrahedron is a polyhedron consisting of four equilateral triangles.-example-1

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.

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