Triangles formulas used to solve the problem.

A

AlaskaR

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In rectangle ABCD, CD = 8, BC=15, area of triable ABF is 30 cm^2 more than area of triangleDEF, determine the length of DE.
 

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AlaskaR said:
In rectangle ABCD, CD = 8, BC=15, area of triable ABF is 30 cm^2 more than area of triangleDEF, determine the length of DE.
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I would start with similar triangles, letting DE = x.

Please show whatever work you have done.
 
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