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# I need urgent help please

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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!

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

$$h=d=4sin(60°)\\ c=4cos(60°)$$

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

$$\overline{DC}=7$$

!

Dec 5, 2020