Name _______________________________________ Date __________________ Class __________________
LESSON
10-5
Practice B
……. Blasi/Omli
Surface Area of Pyramids and Cones
Find the surface area of each pyramid.
1.
2.
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3.
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4.
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5.
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6.
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7.
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8.
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Find the surface area of each cone. Use 3.14 for .
9.
10.
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11.
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12.
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Name _______________________________________ Date __________________ Class __________________
LESSON
10-5
Problem Solving
Surface Area of Pyramids and Cones
Solve the problems.
1. A three-sided pyramid and square
pyramid both have a base perimeter
of 30 cm and the same slant height
and surface area. What is the base
height of the three-sided pyramid?
2. The surface area of a cone is exactly
4,396 units2. The radius of the
2
circular base is
the slant height of
5
the cone. Find r and . Use 3.14 for
.
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3. The Ladrones Tower in Marbella,
Spain, is a cone-shaped building with
a base circumference of 12 m and a
slant height of 14.7 m. Find the
surface area of the structure. Hint:
C
The formula
  expresses the
d
relationship between the
circumference and diameter of a
circle.
4. The Transamerica Building in San
Francisco is a square pyramid with a
metal top. The metal top has a base
perimeter of 43 m and a slant height
of 65 m. How many square meters of
aluminum were required for the top of
the Transamerica Building?
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At the right is a square pyramid designed by Chinese-American
architect I.M. Pei. Use it to answer the questions. Circle the
letter of the correct answer.
5. The pyramid’s base area is
A 35 m
B 140 m2
C 1,225 m2
D 122 m
6. The surface area is of the glass walls is
A 1,890 m2
B 2,112 m2
C 4,114 m2
D 6,028 m2