1= 62.5
2= 62.5
Since a triangle is equal to 180 and both sides are equal that means you'll subtract 55 from 180 which is 125 then 125/2 which is 62.5
A straight line is equal to 180 so 180-105=75
4=75
3+5=105 so
105/2=52.5
To check the answer 4+3+5=180
75+52.5+52.5=180
3=52.5
5=52.5