Elementary Geometry For College Students, 7e
Elementary Geometry For College Students, 7e
7th Edition
ISBN: 9781337614085
Author: Alexander, Daniel C.; Koeberlein, Geralyn M.
Publisher: Cengage,
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Question
Qing uses the Pythagorean theorem again to calcu-
late the height of the triangle h if the base is the side
of length √200. Qing carries this out as follows:
200 2
2
h² = 100
+ h² = 10²
200
4
= 100 50 = 50
h = √50
Next, Qing determines that the floor area of the
storage shed is
40. √/200
square feet. Finally, Qing calculates that the volume
of the storage shed is given by the floor area of the
shed times the height of the triangle:
40. √/200-√/50
a. Is Qing's method of calculation correct? Discuss
Qing's work. Which parts (if any) are correct;
which parts (if any) are incorrect?
b. Solve the volume problem in a different way
than Qing did, explaining your reasoning.
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Transcribed Image Text:Qing uses the Pythagorean theorem again to calcu- late the height of the triangle h if the base is the side of length √200. Qing carries this out as follows: 200 2 2 h² = 100 + h² = 10² 200 4 = 100 50 = 50 h = √50 Next, Qing determines that the floor area of the storage shed is 40. √/200 square feet. Finally, Qing calculates that the volume of the storage shed is given by the floor area of the shed times the height of the triangle: 40. √/200-√/50 a. Is Qing's method of calculation correct? Discuss Qing's work. Which parts (if any) are correct; which parts (if any) are incorrect? b. Solve the volume problem in a different way than Qing did, explaining your reasoning.
reading m
10 ft
Front view
Figure 13.19
10 ft
man e ju
1111 89 H
15. A volume problem:
The front and back of a storage shed are shaped
like isosceles right triangles with two sides of
length 10 ft, as shown on the left of Figure 13.19.
The storage shed is 40 ft long. Determine the vol-
ume of the storage shed.
Qing solves the volume problem as follows:
First, he uses the Pythagorean theorem to deter-
mine that the length of the unknown side of the
triangle shown at the left is √200 ft long. Then,
40 ft
Side view
expand button
Transcribed Image Text:reading m 10 ft Front view Figure 13.19 10 ft man e ju 1111 89 H 15. A volume problem: The front and back of a storage shed are shaped like isosceles right triangles with two sides of length 10 ft, as shown on the left of Figure 13.19. The storage shed is 40 ft long. Determine the vol- ume of the storage shed. Qing solves the volume problem as follows: First, he uses the Pythagorean theorem to deter- mine that the length of the unknown side of the triangle shown at the left is √200 ft long. Then, 40 ft Side view
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