Which of the following also describes a tetrahedron?

2 answers:

8 0

B. A regular pyramid is a tetrahedron, because it is composed of four triangles, has six straight edges, and four vertex corners.

5 0

A tetrahedron is also called a regular triangular pyramid.

option b is the correct answer.

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<em>About the formula</em>

The midpoint is given by the formula ...

m = (a+b)/2

Solving for b gives ...

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