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27 Dec 2015, 10:51
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If the area of circle O is 16π, what is the length of an arc on the circle formed by a central angle measuring 45 degrees?
A. π
B. 3π/2
C. 2π
D. 5π/2
E. 8π
A. π
B. 3π/2
C. 2π
D. 5π/2
E. 8π
27 Dec 2015, 22:16
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Bunuel
If the area of circle O is 16π, what is the length of an arc on the circle formed by a central angle measuring 45 degrees?
A. π
B. 3π/2
C. 2π
D. 5π/2
E. 8π
A. π
B. 3π/2
C. 2π
D. 5π/2
E. 8π
Area=16π
radius=4
8π / 4 = 2π
C. 2π
28 Dec 2015, 01:32
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Area = 16π
Radius = 4
Circumference = 2 x 4 x π = 8π
Angle forming the arc = 45 degrees. 45/360 = 1/8.
Therefore length of arc = 1/8 * 8π = π - Answer choice A.
Radius = 4
Circumference = 2 x 4 x π = 8π
Angle forming the arc = 45 degrees. 45/360 = 1/8.
Therefore length of arc = 1/8 * 8π = π - Answer choice A.
