Answer:
The angles of every triangle add up to 180
Step-by-step explanation:
Angle 2=52) Add 71+57=128. 180-128=52
Angle 1= 123) Angle 57 and 1 are supplementary angles which means they add up to 180. So subtract 57 from 180 which will give you 123.
Angle 3= 29) Now that we know that angle 1 is 123, we add 123 and 28 which gives 151. Then subtract 180-151 which equals 29.
This problem was like a pattern. You work with one part at a time and then you unsolve each part :)
