Leaning Over

Weekly Problem 31 - 2017
The triangle HIJ has the same area as the square FGHI. What is the distance from J to the line extended through F and G?
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Problem

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Leaning Over


The triangle $HIJ$ has the same area as the square $FGHI$.

$FG$ has a length of 4cm.

What is the perpendicular distance from $J$ to the extension of the line $FG$?

If you liked this problem, here is an NRICH task that challenges you to use similar mathematical ideas.