That red triangle is so isolated!

Geometry Level 4

In rectangle ABCDABCD, K,H,JK,H,J are the mid-points of BC,AB,DCBC,AB,DC respectively. Line-segments AC,HJ,DKAC,HJ,DK bound a red triangle EFGEFG. Find the ratio of the area of the big rectangle to the area of red triangle. Give your answer to correct 2 decimal places.


This problem is original.
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