Question

$\frac{1}{3}$ ∠D+∠D=180°
Решите Уровнение пж

Answer 1

1/3∠D + ∠D = 180°
1 1/3∠D = 180°
4/3∠D = 180°
∠D = 180° : 4/3
∠D = 180° * 3/4
∠D = 135°