Cannot get aspect ration to 1 with simple Graphics

I am learning Mathematica and doing a simple animation project which animates the harmonic motion of a pendulum. For some reason, I cannot get the simplest thing to work — the aspect ratio for my pendulum graph will not go to 1. I have whittled my code down to something extremely simple that illustrates my problem:

Graphics[Line[{{0, 0}, {.5, -.5}}], Axes -> True, PlotRange -> {{-1.1, 1.1}, {-1.1, 0}}, AspectRatio -> 1]

Output of the code above