A tetrahedron has how many edges?

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Prepare for the JH Academic Bowl Test with flashcards and multiple choice questions, including hints and explanations. Elevate your confidence ahead of the exam!

Multiple Choice

A tetrahedron has how many edges?

Explanation:
A tetrahedron has four vertices, and each vertex connects to every other vertex. Counting each connection once gives 4 × 3 / 2 = 6 edges. You can also see it by starting with a base triangle (three edges) and connecting the top vertex to the three base vertices, adding three more edges for a total of six. This matches its four triangular faces as well. So the number of edges is six.

A tetrahedron has four vertices, and each vertex connects to every other vertex. Counting each connection once gives 4 × 3 / 2 = 6 edges. You can also see it by starting with a base triangle (three edges) and connecting the top vertex to the three base vertices, adding three more edges for a total of six. This matches its four triangular faces as well. So the number of edges is six.

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