Geometry 12.2 2­26.notebook
February 26, 2015
Grading GRAB CRAYON
12.1 Workbook
ID's ON!
Mar 02­10:58 AM
Announcements
­ Problem of the Week DUE FRIDAY
­ 12.2 two day lesson
­ Many people have not made up their tests yet.
­ Absent people Monday. RECAP Mar 02­11:25 AM
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Geometry 12.2 2­26.notebook
February 26, 2015
12.2 Surface Area of Prisms and Cylinders
Bell Work
1. Determine whether the solid is a polyhedron. If it is, name it. Pentagonal Prism
2. Describe the shape formed by a horizontal cross section. Rectangle
3. Describe the shape formed by a vertical cross section. Pentagon
4. How many lateral faces are there? Four
5. What is the area formula for a regular polygon.
Mar 02­11:06 AM
Lateral Face
8
Lateral Edge
7
7.5
Base
20
10
Lateral Area
Mar 02­11:44 AM
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Geometry 12.2 2­26.notebook
February 26, 2015
Townhouse Box Rectanglar Prism
NET
8 cm
4 cm
6 cm
Mar 02­11:38 AM
Surface Area of a Prism a = apothem
B = area of Base
P = perimeter of base
h = height
LA = Lateral Area
SA = Surface Area
SA = 2B + Ph
LA = Ph
Mar 02­12:03 PM
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Geometry 12.2 2­26.notebook
February 26, 2015
Find the surface area of this solid figure. what you know:
Formula
Mar 4­10:03 AM
Find the height of this solid figure. what you know:
Formula
Feb 25­9:48 AM
4
Geometry 12.2 2­26.notebook
February 26, 2015
Find the surface area of this solid figure. what you know:
7.5
10.9
Formula
28.6
10.1
11.25
Feb 25­9:48 AM
Find the surface area of the right pentagonal prism.
what you know:
Formula
Mar 02­12:09 PM
5
Geometry 12.2 2­26.notebook
February 26, 2015
Cylinder : SOUP CAN
How do you find the
surface area of a
cylinder?
Mar 02­12:16 PM
Surface Area of a Cylinder
SA = 2B + Ch
or
SA = 2 r + 2r h
LA = 2r h
B= C=
Mar 02­12:18 PM
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Geometry 12.2 2­26.notebook
February 26, 2015
Find the surface area of the right cylinder.
what you know:
Formula
Mar 02­12:23 PM
Find the height of the right cylinder which has the surface area of 262.64 centimeters squared.
what you know:
Formula
Mar 02­12:25 PM
7
Geometry 12.2 2­26.notebook
February 26, 2015
Assignment 12.2 Workbook
#1­16 separate sheet of paper
round three decimal places
Mar 02­12:27 PM
Mar 4­10:04 AM
8
Geometry 12.2 2­26.notebook
February 26, 2015
Mar 4­10:05 AM
Mar 4­10:05 AM
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Geometry 12.2 2­26.notebook
February 26, 2015
Mar 4­10:05 AM
Mar 4­10:06 AM
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