Question

in a triangleABC angle c=3 b =2(a+b) find these angles​

Answer 1

Answer:

let angleA=x and angleB=y then put the value and then apply sum of angle of triangle is 180 degree very simple.

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Answer 2

In ΔABC, we are given that ∠C=3∠B=2(∠A+∠B)

                                             hence 3∠B/2= ∠A+∠B

We know that

(∠A+∠B)+∠C=180 (angle sum property of a triangle)

3∠B/2 +3∠B=180

3∠B+6∠B=180*2

9∠B=360

∠B= 360/9=40

Hence ∠C=3∠B=3*40

∠C=120

Also, ∠C=2(∠A+∠B)

120/2=∠A+40

∠A=60-40

∠A=20

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