1.

2: In ABC, if

Answer»

Step-by-step explanation:

Answer:

We KNOW that in a △, the sum of all the INTERIOR angles is 180

∘

⇒∠A+∠B+∠C=180

∘

........(1)

Also given that,

∠C=3∠B and 3∠B=2∠A+2∠B

∠A=

2

∠B

Substituting values in (1), we get

2

∠B+∠B+3∠B=180

∴∠B=40

∠A=20

∠C=120

Explanation:

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