Answer: Triangular-based pyramids have 6 edges, 3 are along the base and 3 are extending up from the base.
Explanation:
All triangular-based pyramids, either regular or irregular, have four vertices. Triangular-based pyramids have 6 edges, 3 are along the base and 3 are extending up from the base. If the six edges are of the same length, all the triangles are equilateral, and the pyramid is called a regular tetrahedron.
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