Triangle inequality question?

Question

In triangle ABC, m<A = 30° and m<B = 50°. Which is the longest side of the triangle ?

What does m represents?

Answer 1

In triangle sum of the angles is 180

m<A+m<B+m<C=180

30+50+m<C=180

m<C=100

Opposite side of largest angle is longest side

So c is the longest side.