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Key Concept Quiz 8.2
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1
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Diana is building an ultralight aircraft. The blueprint for the instrument panel is shown. Each grid line measures 5 cm. Find the area of metal needed for the panel, before holes are cut for the instruments.
A)1200 cm2
B)1000 cm2
C)800 cm2
D)600 cm2
2
Find the total area of the cutouts for the instruments.
A)78.5 cm2
B)157.1 cm2
C)235.6 cm2
D)314.2 cm2
3
Find the area of aluminum in the completed instrument panel.
A)685.9 cm2
B)764.4 cm2
C)842.9 cm2
D)921.5 cm2
4
The outside edge of the panel must have plastic edging attached. How long a piece of edging is required?
A)144.7 cm
B)140 cm
C)100 cm
D)72.4 cm
5
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Domino lives in a house with a loft that has a floor area as shown. Domino plans to recarpet the floor with carpeting that sells for $12/m2. How much will the carpet cost ?
A)$240
B)$360
C)$420
D)$480





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