∠RNK = 90° + 30° = 120°
RN =72/2 = 36
Cos 30° = RN/NO = √3/2
NO = 2RN/√3 = 2*36/√3 = (2*36*√3)/3 = 24√3
Радиус NO = 24√3
∠RNK = 90° + 30° = 120°
RN =72/2 = 36
Cos 30° = RN/NO = √3/2
NO = 2RN/√3 = 2*36/√3 = (2*36*√3)/3 = 24√3
Радиус NO = 24√3