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Question from ally, a parent:
how many vertices, edges, faces in a triangular pyramid?

Ally,

A triangular pyramid has a triangular base and one other vertex; it is also known as a "tetrahedron". Each vertex of the base is joined to the top vertex by an edge.

Can you make a model out of (say) plasticine or toothpicks? If not, cut out the diagram below and fold it up into a model. Then count the various bits.

net

Good Hunting!
RD

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