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+80 +80 Dec 26, 2018
We know $\overline {DE}\parallel \overline {BC}.$ Given $[ADE]=9$ and $[CDE]=6,$ find $[ABC].$ [asy] size(5cm); pair A,B,C,D,EE; B=(0,0); C=(5,0); A=(3,3); D=(2A+3C)/5; EE=(2A+3B)/5; draw(C--B--A--C--EE--D); label("$A$",A,N); label("$B$",B,SW); label("$C$",C,SE);read more .. +80 +816 +80 +80 +80 +80 +80
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