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Problem of the Week
Problem E
Zigzagged

A fence is to be constructed in a zigzag pattern inside a rectangular field, as shown.

Rectangle ABCD with top left vertex A, length AB, and width
AD. E is on AB, H and G are on CD, with H to the left of G, and F is on
BC. The fence starts at vertex A and goes from A to H to E to G to
F.

The fence will be constructed so that AHD=EHG, AEH=BEG, EGH=FGC, and CF=12 m. If AB=36 m and AD=20 m, determine the total length of fencing required. That is, determine the value of AH+EH+EG+FG.