Warm Up
Over Lesson 1–6
Name polygon A by its
number of sides.
Is it regular or irregular?
Concave or Convex?
Find the perimeter of polygon A.
Take Note
Polyhedron
Description: a solid with all flat surfaces that is
enclosed
Diagram:
For Example
Identify Solids
A. Determine whether the solid is a polyhedron.
Then identify the solid. If it is a polyhedron, name
the bases, faces, edges, and vertices.
For Example
Identify Solids
The solid is formed by polygonal faces, so it is a
polyhedron. The bases are rectangles. This solid is a
rectangular prism.
Answer: rectangular prism;
Bases: rectangles EFHG, ABDC
Faces: rectangles FBDH, EACG, GCDH,
EFBA, EFHG, ABDC
Vertices: A, B, C, D, E, F, G, H
You Try
Identify Solids
B. Determine whether the solid is a polyhedron.
Then identify the solid. If it is a polyhedron, name
the bases, faces, edges, and vertices.
For Example
Identify Solids
The solid is formed by polygonal faces, so it is a
polyhedron. The bases are hexagons. This solid is a
hexagonal prism.
Answer: hexagonal prism;
Bases: hexagon EFGHIJ and hexagon
KLMNOP
Faces: rectangles EFLK, FGML, GHNM,
HNOI, IOPJ, JPKE; hexagons EFGHIJ
and KLMNOP
Vertices: E, F, G, H, I, J, K, L, M, N, O, P
For Example
Identify Solids
C. Determine whether the solid is a polyhedron.
Then identify the solid. If it is a polyhedron, name
the bases, faces, edges, and vertices.
For Example
Identify Solids
The solid has a curved surface, so it is not a
polyhedron. The base is a circle and there is one
vertex. So, it is a cone.
Answer: Base: circle T
Vertex: W
no faces or edges
You Try
A. Identify the solid.
A. triangular pyramid
B. pentagonal prism
C. rectangular prism
D. square pyramid
You Try
B. Identify the solid.
A. cone
B. cylinder
C. pyramid
D. polyhedron
Homework
• HW 9: Pg. 70 #’s 6-16, 38