All the circles below are congruent. The total area of the nine congruent circles is 324. The
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All the circles below are congruent. The total area of the nine congruent circles is 324π. The square passes through the center of eight circles as shown. What is the area of the shaded region?
A. 1,296 − 144π
B. 576 − 144π
C. 324 − 144π
D. 576 − 72π
E. 324 − 72π
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