Angle 1 & Angle 2 are ADJACENT ANGLES as they are both next to each other.
It's because a tenth means that you've divided it by 10. So if it's 20, it means you're multiplying tenths by 20, leaving you with 2 wholes.
For example, you have 2 cakes and you cut each into 10 slices, the slices are each one tenth of the whole cake, and in total there are 20 tenths.
It's the inverse operation of squaring that number. It's an odd definition to explain lol
