10-5
Exercises
KEYWORD: MG7 10-5
KEYWORD: MG7 Parent
GUIDED PRACTICE
1. Vocabulary Describe the endpoints of an axis of a cone.
SEE EXAMPLE
1
p. 689
Find the lateral area and surface area of each regular pyramid.
2.
3.
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4. a regular triangular pyramid with base edge length 15 in. and slant height 20 in.
SEE EXAMPLE
2
p. 691
Find the lateral area and surface area of each right cone. Give your answers in
terms of π.
5.
6.
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7. a cone with base area 36π ft 2 and slant height 8 ft
SEE EXAMPLE
3
p. 691
Describe the effect of each change on the surface area of the given figure.
8. The dimensions are cut in half.
9. The dimensions are tripled.
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SEE EXAMPLE 4
p. 692
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Find the surface area of each composite figure.
10.
11.
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SEE EXAMPLE
p. 692
5
12. Crafts Anna is making a birthday hat from a pattern
that is __34 of a circle of colored paper. If Anna’s head is
7 inches in diameter, will the hat fit her? Explain.
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10- 5 Surface Area of Pyramids and Cones
693