If you are given the ratios of the angles of a triangle, how do you find the degrees?

Question

If you are given the ratios of the angles of a triangle, how do you find the degrees?

Please use basic geometry as this is a question my 9th-grade daughter had for me.

Answer 1

Thank you all. I found the answer.

If it were a ratio of 3:6:1, this can be solved by 3x+6x+1x=180, and simply solve for x.

Answer 2

With mid-school tools, very simply:

If, say, $\:(\alpha:\beta:\gamma)=(3:4:5)$, then

$$\frac\alpha3=\frac\beta4=\frac\gamma 5=\frac{\alpha+\beta+\gamma}{3+4+5}=\frac{180}{12}=15.$$