Question

in triangle ABC if angleA-angleB=42°and angle B-angleC=21°then find angle B​

Answer 1

Step-by-step explanation:

Sum of all three angles of a triangle=180°

Therefore,

Angle'A' + Angle'B' + Angle'C'=180°

42° + X + 21° =180°

63° + X =180°

X = 180-63

= 117° Answer

Answer 2

Answer:

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