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<p>$ABCD$ is a rectangle with $AB=40$cm and $AD=24$cm.  An isosceles triangle $DEF$ with $DE=EF$ is drawn on this rectangle.  Given that&nbsp;$AE=7$cm and $CF=26$cm, find the area of triangle $DEF$.</p>

$ABCD$ is a rectangle with $AB=40$cm and $AD=24$cm.  An isosceles triangle $DEF$ with $DE=EF$ is drawn on this rectangle.  Given that $AE=7$cm and $CF=26$cm, find the area of triangle $DEF$.

Area of an Isosceles Triangle within a Rectangle

Area of an Isosceles Triangle within a Rectangle

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