Problem 112 of 7
Find the missing value from sector area formula with A=81 and theta=2 radians.
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rearrange sector area formula.
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Use A=1/2 r^2 theta with theta in radians.
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Solution
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1. Write A=1/2 r^2 theta.
2. Substitute known values.
3. Solve algebraically for the missing radius or angle.
Use the worked steps, then substitute the final answer back into the original relationship to confirm it satisfies the prompt.
Confusing sector area with arc length.