the fence is 10 feet wide , so what is the length that we can use the available fence on hand?
for the 2 wide sides you will need 10 x 2 = 20 feet.
left 44-20 = 24 feet.
24 feet will be enough to cover 12 feet long fence (12 x 2) + (10 x 2) = 44 feet
good luck.