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OpenStudy (anonymous):
Two triangles are inscribed within a circle. A square whose sides have a length of 9 cm is inscribed within the larger triangle as shown in the figure. The length AB is 15 cm. The angles ∠CAB and ∠DAB are a right angles. The line CD passes through the center of the circle. Finally, the large triangle ∆ABC is similar to ∆ABD. What is the area of the circle? Round your answer to 2 significant figures.
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