• measure angle a = 45°
• measure angle b = 90°
• measure angle c = 50°
• measure angle d = 50°
• measure angle e = 90°
• measure angle g = 130°
• measure angle h = 50°
• measure angle i = 130°
• measure angle k = 85°
• measure angle l = 85°
• measure angle n = 85°

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