A sector of a circle has radius 9 cm and angle 120°. What is its area? (Give the answer in terms of .)
Answer and explanation
Correct answer: D.
- Step 1: Area of a sector = .
- Step 2: cm².
Answer
.
Why not the others: : 180 was used instead of 360. : the radius was not squared. : this is related to the arc length, not the area.
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