Question

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Answer 1

Răspuns:

Explicație pas cu pas:

0,(3) = 3/9 = 1/3

0,5AB = BC/3

BC = 1,5AB

AC = BC/3 = 1,5AB/3 = 0,5AB

AB + AC + BC = 360°

AB + 0,5AB + 1,5AB = 360°

3AB = 360°

AB = 360° : 3 = 120°

AC = 0,5*120 = 60°

BC = 1,5*120 = 180°

Unghiul A subintinde arcul BC si are 180° : 2 = 90°

Unghiul B sunibtinde arcul AC si are 60° : 2 = 30°

Unghiul C subintinde arcul AB si are 120° : 2 = 60°