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ABCD is a isosceles trapezoid with AB=10, DB=8 and angle A=120 degrees what is the length of CD

 Feb 26, 2020
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ABCD is a isosceles trapezoid with AB=10, DB=8 and angle A=120 degrees what is the length of CD

( This question is not written correctly. Cannot be DB=8 It's either CB=8, or DA=8)

Angle FBC = 120° - 90° = 30°

FC = sin(∠FBC) * 8  = 4

CD = AB + 2 (FC) = 18 units  indecision

 

 Feb 26, 2020

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