# In , if 3 = 4 =6 , calculate , and . =80°, =60°, =40°

Let 3 = 4 =6 = a

Therefore,

A = a/3, B = a/4, C = a/6 ____________________ (i)

A + B + C = 180° [Sum of angles]

a/3 + a/4 + a/6 = 180°

9a/12 = 180°

a = 240°

A = a/3 = 240° /3 = 80°

B = a/4 = 240° /4 = 60°

C = a/6 = 240° /6 = 40°

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