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1.
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Estimate the area of a circle with each radius.
r = 3 cm
a. | 20 cm2 | b. | 30 cm2 | c. | 40 cm2 | d. | 50
cm2 |
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2.
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r = 8 m
a. | 100 m2 | b. | 200 m2 | c. | 300 m2 | d. | 400
m2 |
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3.
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r = 4.5 mm
a. | 60.0 mm2 | b. | 70.0 mm2 | c. | 80.0 mm2 | d. | 90.0
mm2 |
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4.
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r = 16.7 cm
a. | 600.0 cm2 | b. | 750.0 cm2 | c. | 850.0 cm2 | d. | 1000.0
cm2 |
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5.
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Estimate the area of a circle with each diameter.
d = 10 m
a. | 60 m2 | b. | 70 m2 | c. | 80 m2 | d. | 300
m2 |
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6.
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d = 14 mm
a. | 100 mm2 | b. | 150 mm2 | c. | 200 mm2 | d. | 250
mm2 |
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7.
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d = 17.5 mm
a. | 100.0 mm2 | b. | 250.0 mm2 | c. | 500.0 mm2 | d. | 1000.0
mm2 |
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8.
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d = 0.5 m
a. | 0.2 m2 | b. | 1 m2 | c. | 2 m2 | d. | 3
m2 |
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9.
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Garrett is covering a wooden circular surface with material. If the diameter of
the circle is 7 m, about how much material will he need?
a. | 15 m2 | b. | 40 m2 | c. | 100 m2 | d. | 200
m2 |
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10.
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A clock has a minute hand that is 8 cm long. Approximately what is the
area of the clock face?
a. | 200 cm2 | b. | 500 cm2 | c. | 1000 cm2 | d. | 2000
cm2 |
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