1. <7 = 65°
2. <4 = 115°
3. <6 = 115°
4. <1 = 65°
5. <16 = 60°
6. <18 = 60°
7. <21 = 120°
8. <10 = 55°
9. <11 = 125°
10. <12 = 55°
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