х + х + 70 = 180
2х + 70 = 180
2х = 180 - 70
2х = 110
х = 110 : 2
х = 55
55 + 55 + 70 = 180
55 + 125 = 180
Ответ: 55°
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х + х + 70 = 180
2х + 70 = 180
2х = 180 - 70
2х = 110
х = 110 : 2
х = 55
55 + 55 + 70 = 180
55 + 125 = 180
Ответ: 55°