how do you do 3s<180

Yes McKmney, I agree, 60 is less than 180 but that does not tell us much about s      LOL

3s<180

s<180/3

s<60

3s<180 -> 3s=180 -> 180/3=60 -> 3(60)=180, so s=60 which that means 60<180.

I'll give you 3 points for having a go  - and because I am in a playful mood :)