Distance formula doesn’t make sense?

I am testing which point is closest to (-0.75, 0.56), either (-0.46, 0.39) or (-0.81, 0.75). Obviously (-0.46, 0.39) should be closer. However,

from (-0.75, 0.56) to (-0.46, 0.39) I get a distance of 0.336
and from (-0.75, 0.56) to (-0.81, 0.75) I get a distance of 0.199

This doesn’t make sense! What am I doing wrong?