Question

in traingle ABC,LC is equal to 3,LB is equal to 2(LA+LB). then LC is​

Answer 1

Answer:

trainhle the sum of all the interior angles is 180∘

⇒∠A+∠B+∠C=180∘.

∠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

I hope it helps you