Odpowiedź:
a) 10cx + 7cx + cx = 180°
18 cx = 180° | : 18
cx = 10°
10cx = 10 * 10° = 100°
7cx = 7 * 10° = 70°
b) 4cx + 20° + 3cx + cx= 180°
8cx + 20° = 180° | - 20°
8cx = 160° | : 8
cx = 20°
4cx + 20° = 4 * 20° + 20° = 80° + 20° = 100°
3cx = 3 * 20° = 60°
c) 2cx - 60° + cx + 3cx - 120° = 180°
6cx - 60° - 120° = 180°
6cx = 180° + 60° + 120°
6cx = 360° | : 6
cx = 60°
2cx - 60° = 2 * 60° - 60° = 60°
3cx - 120° = 3 * 60° - 120° = 180° - 120° = 60°
Szczegółowe wyjaśnienie:
