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Can You Solve A 5th Grade Problem From China? Find The Area Of ABCD

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Channel: MindYourDecisions
Categories: Brain Teasers   |   Geometry   |   Math  
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Thanks to Eric from Miami for suggesting this problem and sending a solution! The diagram shows a quadrilateral ABCD with the values for some angles and the length of AB. Can you figure out the area of ABCD?

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