For question 1. a five sided shape has 540° , so if you add all the sides up you get 479, so then you do 540 - 479, to get 61°, which is x
so, x° = 61°
4.32. Well, you line up the decimals like this:
.54
8. you can add two zeros if you need
I think you will know how to multiply but hopefully this helped. Comment if you need me to explain. It is kind of hard to show multiplication on an computer.
Answer:
1) a 130° - (360 - (50×2)) /2
B 50° - opposite angles
2) a 25° - 90° - 65 = 25 °
B 270° - 360° - 90° = 270°
3) a ) 60° - 180° - 120° = 60° (there are 180° in a straight line)
B) 90° - 180°-90° = 90°