Chapter 10 Lesson 5

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Chapter 10 Lesson 5

• Objective To find the volume of cylinders and
  composite figures.

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Theorem 10-7

• Volume of a Cylinder

Base Area
Radius
Volume
Height
Base Area
h
Base Area
Radius
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Example 1 Volume of a Cylinder

• Find the volume of a cylinder with height 10 cm
  and radius 5 cm.

5 cm
10 cm
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Example 2 Volume of a Cylinder

• Find the volume of the cylinder.

9 ft
6 ft
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Example 3 Volume of a Cylinder

Find the volume of the cylinder. Give your
answers in terms of ? and rounded to the nearest
tenth.
V ?r2h
?(9)2(14)
1134? in3 ? 3562.6 in3
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Composite Figures
A composite space figure is a three-dimensional
figure that is the combination of two or more
simpler figures.
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Example 5 Composite Figures
Use a composite space figure to estimate the
volume of the backpack shown.     
Prism V lwh (12 4)11 528
Sum of the two volumes 528 226 754 The
approximate volume of the backpack is 754 in.3.
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Assignment
Page 548 9-15