alpha ist halb so groß wie beta?

Answer 1

[merkurus]

Berechnung
x=beta ; 0,5x=alpha
---
(0,5x * 2) + (x * 2) = 360
x + 2x = 360
3x = 360
x = 120
---
beta = 120°
alpha = 60°
delta = beta = 120°
gamma = alpha = 60°