How to do terrible triangle trouble puzzles? ?

how would you solve this side of i'm so confused the reason why some of it is done it cuz some people told me the answers but i want to know how to do it by myself with !

I would start at making it more easy by asking my dad or mom for help

OK so it is not as hard as it seems if you add all the angles inside of one triangleit will always be 180 if you did it right and if you and 2 conecting triangs side by side if they are a stright line you would also get 180 ..and if it is not a triangle and it is some type of quadralateral, meaning a shape with 4 sides, you should always add up to 360

For example where you got 50 degrees all you had to do was add up your givin angles and subtract it by 180 since it is a triangle and that would give you 50 if you have any more questions on this just ask

The answer to that is 6