Mathematics, 02.02.2020 21:48, batmanmarie2004

We have 2 polyhedral (i. e., solids with polygonal faces), all of whose edges have length 1: a pyramid with a square base, and a tetrahedron (a tetrahedron is composed of 4 triangular faces). suppose we glue the 2 polyhedral together along a triangular face (so that the attached faces exactly overlap). how many faces does the new solid have?

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We have 2 polyhedral (i. e., solids with polygonal faces), all of whose edges have length 1: a pyra...