Question

The angles of a triangle are in the ratio 3:4:5. How do you find the measures of the angles?

Answer 1

Let's call the angles `3x,4x and 5x`

They must add up to `180^o` in a triangle, so:

`3x+4x+5x=12x=180->x=180//12=15`

So the angles are:
`3*15=45^o`
`4*15=60^o`
`5*15=75^o`

Check answer: `45+60+75=180`