Are all the surfaces flat? What does this tell us about whether or not it is a polyhedron? What are the types of polyhedrons?
Figure Name
Bases
Faces
Edges
Vertices
Triangular Prism
TVU, QSR
TVU, QSR, QTVS, SVUR, RUTQ
QT, TV, VS, QS, SR, VU, RU, QR, UT
Q,T,V,S,R,U
Practice makes perfect
Let's begin by reviewing the definition of a polyhedron.
A polyhedron is a solid composed of all flat surfaces that enclose a single region of space.
Examining the given solid, we can see that it meets this definition.
Therefore, it is a polyhedron.
Now, let's consider two types of polyhedrons.
A prism has two parallel congruent bases connected by parallelogram faces.
A pyramid has a polygonal base and three or more triangular faces that meet at a common vertex.
The solid has two parallel congruent bases that are triangles, so it is a triangular prism.
Let's recall the meaning of the features that we want to identify.
