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MetalPen

  • 4 years ago

Quadrilateral ABDC is a trapezoid parallel to CD. We know AB=20 and CD=12. What is the ratio of the area of triangle ACB to the area of the trapezoid ABCD? Express your answer as a common fraction. (I am in a "self teach" class. It's not working. I have no experience so please be thorough if you have time!)

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