A(6,1),B(8,2) and C(9,4) are the vertice...

A(6,1),B(8,2) and C(9,4) are the vertices of a parallelogram ABCD. If E is the midpoint of DC, find the area of `Delta` ADE.

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P is MP of AC and BC
P=`((6+9)/2,(1+4)/2)`
`(15/2,5/2)=((x+8)/2,(y+2)/2)`
`x+8=15`
`x=7`
`y+2=5`
`y=3`
D(7,3)
...

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