Problem 64 of 7
Find sector area for radius 9 and central angle 2 radians.
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use A=1/2 r^2 theta.
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Central angle must be in radians; use A=1/2 r^2 theta.
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Solution
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1. Identify r and theta in radians.
2. Compute one-half times r squared times theta.
3. Simplify exact pi form or decimal value.
Use the worked steps, then substitute the final answer back into the original relationship to confirm it satisfies the prompt.
Using arc length formula for area.