Respuesta:
2x + 10° + x + 40° + 3x - 20° = 180°
6x + 30° = 180°
6x = 150°
x = 25°
<ABC = 3(25) - 20 = 55°
<ACB = 25 + 40 = 65°
<BAC = 2(25) + 10 = 60°
---------
180°
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Respuesta:
2x + 10° + x + 40° + 3x - 20° = 180°
6x + 30° = 180°
6x = 150°
x = 25°
<ABC = 3(25) - 20 = 55°
<ACB = 25 + 40 = 65°
<BAC = 2(25) + 10 = 60°
---------
180°