Should work 'if' the 'hill' isn't too steep. the concept of a hill is very different depending on the area of the country. (what I call  'hills' you would likely call mountains)

I would add on the end swing pivot and pick up all the corners you left out of your 3/4 circle. May as well irrigate all the ground.

Edit,, I'd even put a swing pivot on the 1/2 circle and get everything wet there too!