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Angulo Interno
180(n - 2)/n = 180(15 - 2)/15 = 180(13)/15 = 156°
Angulo Externo
360/n = 360/15 = 24°
20 lados:
Angulo Interno
180(n - 2)/n = 180(20 - 2)/20 = 180(18)/20 = 162°
Angulo Externo
360/n = 360/20 = 18°
18 lados:
Angulo Interno
180(n - 2)/n = 180(18 - 2)/18 = 180(16)/18 = 160°
Angulo Externo
360/n = 360/18 = 20°