If a triangle has angles α=30∘\alpha = 30^{\circ}α=30∘ and β=60∘\beta = 60^{\circ}β=60∘, what is the third angle γ\gammaγ?
90∘90^{\circ}90∘
30∘30^{\circ}30∘
60∘60^{\circ}60∘
120∘120^{\circ}120∘