Name
LESSON
Date
Class
Reteach
10-7 Volume of Pyramids and Cones
Volume of a Pyramid
The volume of a pyramid with base area B
and height h is
1 Bh.
V ! __
3
H
Volume of a Cone
The volume of a cone with base area B,
radius r, and height h is
1 "r 2h.
1 Bh, or V ! __
V ! __
3
3
H
R
Find the volume of each pyramid. Round to the nearest tenth
if necessary.
2.
1.
10 mm
7 in.
8 mm
3 in.
5 in.
8 mm
V ! 213.3 mm3
V ! 35 in3
Find the volume of each cone. Give your answers both in terms of "
and rounded to the nearest tenth.
4.
3.
12 ft
3 cm
11 cm
4 ft
V ! 33" cm3 " 103.7 cm3
V ! 64" ft3 " 201.1 ft3
Copyright © by Holt, Rinehart and Winston.
All rights reserved.
54
Holt Geometry
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9. Find the area of the pentagonal pyramid with apothem of 12 mm.
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