okay so to find this you need an equation to find x. for you have 5x+x=180
6x=180 divide both sides by 6 you get x=30 now you can double check. one angle is 30 and one is 5*30 see if you get 180 you 30+5*30 5*30=150+30=180 so it's correct. so x=30 so to find the smallest angles could be x=180-5x
i hope this helped you have an amazing day!!