45∘,30∘45^{\circ}, 30^{\circ}45∘,30∘
30∘,40∘30^{\circ}, 40^{\circ}30∘,40∘
20∘,45∘20^{\circ}, 45^{\circ}20∘,45∘
10∘,70∘10^{\circ}, 70^{\circ}10∘,70∘
30∘30^{\circ}30∘
