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Two concentric circles with center A. Points D and B are marked on the inner circle and points E and C are marked on the outer circle. Another line runs downward from A through B to C. Angle D A B is 45 degrees. A B is 5 units and A C is 7 units. What is the area of the shaded region in the diagram? Use the value π = 3.14, and round your answer to two decimal places.
A. 19.23 square units B. 9.81 square units C. 1.57 square units D. 9.42 square units
Sagot :
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