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ABCD is a trapezoid with bases AB and DC. We know that angle C equals 60 and angle D=45. If AB=5-2sqrt3 and BC=4, what is DC?

 Dec 5, 2020
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ABCD is a trapezoid with bases AB and DC. We know that angle C equals 60 and angle D=45. If AB=5-2sqrt3 and BC=4, what is DC?

 

Hello Guest!

 

\(\overline{DC}=d+(5-2\sqrt{3})+c\)

 

\(h=d=4sin(60°)\\ c=4cos(60°)\)

 

\(\overline{DC}=4sin(60°)+(5-2\sqrt{3})+4cos(60°)\)

\(\overline{DC}=7\)

laugh   !

 Dec 5, 2020

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