Geometry must've been Julianne Hough's star subject in grade school, because she really knows how to rock a frock with shapely cut-outs!
Julianne was a cut above the rest in a chic black Camilla and Marc dress with Brian Atwood shoes.
Completing her fashionable mathematic equation of an outfit was a Pluma Italia cuff, Sydney Evans ring and earrings and a Rafe clutch.
Pythagoras would approve!
[Image via Wire Image/Stefanie Keenan/Getty Images.]