1. Warm Up
Problem of the Day
Lesson Presentation
Lesson Quizzes

2. 1. The diameter of a circle is 12 in. What is the circumference?
Warm Up
Solve. Use 3.14 for .
1. The diameter of a circle is 12 in. What is
the circumference?
37.68 in.
2. The radius of a circle is 9 cm. What is its circumference?
56.52 cm
3. Find the area of a circle with a 12 ft
radius.
ft2 2

3. Problem of the Day
To measure the perimeter of her square patio, Becky used an old bicycle wheel with a 22 in. diameter. She rolled the wheel from one corner of the patio along the edge to the next. The wheel made 6.75 revolutions. What is the perimeter in feet of the patio? Use for . ft 3

4. Sunshine State Standards
Review of MA.5.G.3.1 Analyze and compare the properties…of three-dimensional solids (polyhedra)…
Also Prep for MA.6.G.4.3

5. Vocabulary polyhedron cylinder face pyramid edge cone vertex sphere
prism
base 5

6. A polyhedron is a three-dimensional object with flat surfaces, called faces, that are polygons.
When two faces of a three-dimensional figure share a side, they form an edge. A point at which three or more edges meet is a vertex (plural: vertices). 6

7. A prism is a polyhedron with two congruent, parallel bases, and other faces that are all parallelograms. A prism is named for the shape of its bases. A cylinder also has two congruent, parallel bases, but bases of a cylinder are circular. A cylinder is not a polyhedron because not every surface is a polygon. 7

8. A pyramid has one polygon-shaped base and three or more triangular faces that share a vertex. A pyramid is named for the shape of its base. A cone has a circular base and a curved surface that comes to a point. A sphere has no base and one curved surface. All points on the surface are the same distance from a point called the center of the sphere. 8

9. Helpful Hint
Cones and spheres are not polyhedrons because they have curved surfaces. 9

10. Name the three-dimensional figure represented by the object.
Check It Out: Example 2B
Name the three-dimensional figure represented by the object.
All the faces are flat and are polygons.
The figure is a polyhedron.
There are two congruent, parallel bases, so the figure is a prism. The bases are rectangles.
The figure is a rectangular prism. 10

11. Lesson Quiz for Student Response Systems
Lesson Quizzes
Standard Lesson Quiz
Lesson Quiz for Student Response Systems 11

12. Identify the figure described.
Lesson Quiz
1. Identify the number of faces, edges, and vertices in the figure shown.
Identify the figure described.
2. two congruent circular faces connected by a curved surface
3. one flat circular face and a curved lateral surface that comes to a point
8 faces, 18 edges, and 12 vertices
cylinder
cone 12

13. Lesson Quiz for Student Response Systems
1. Identify the number of faces, edges, and vertices in the figure shown.
A. 9 faces, 21 edges, and 14 vertices
B. 21 faces, 9 edges, and 14 vertices
C. 9 faces, 14 edges, and 21 vertices
D. 21 faces, 14 edges, and 9 vertices 13

14. Lesson Quiz for Student Response Systems
2. Identify the figure described. A square base with four triangles that come to a point.
A. square prism
B. square pyramid
C. rectangular prism
D. rectangular pyramid 14

15. Lesson Quiz for Student Response Systems
3. Identify the figure described. A hexagonal base with six triangles that come to a point.
A. hexagonal prism
B. triangular prism
C. hexagonal pyramid
D. triangular pyramid 15