60∘,60∘ and 240∘60^{\circ}, 60^{\circ} \text { and } 240^{\circ}60∘,60∘ and 240∘
90∘,90∘ and 180∘90^{\circ}, 90^{\circ} \text { and } 180^{\circ}90∘,90∘ and 180∘
120∘,120∘ and 120∘120^{\circ}, 120^{\circ} \text { and } 120^{\circ}120∘,120∘ and 120∘
150∘,150∘ and 60∘150^{\circ}, 150^{\circ} \text { and } 60^{\circ}150∘,150∘ and 60∘
