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Solve mixed circle problems with arcs, angles, and sectors
Worksheet
Grade Level
Geometry
GEO.133 Solve mixed circle problems with arcs, angles, and sectors
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A student uses diameter 18 as the radius for a 120-degree sector and gets arc length 12pi. Which setup and result correctly fix the arc length?
A
Use r=18, so arc length=(120/360)2pi(18)=12pi units
B
Use r=9, so arc length=(120/360)2pi(9)=6pi units
C
Use r=9, so sector area=(120/360)pi(9
2
)=27pi square units
D
Use r=18/120, so arc length=pi/3 units
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