The two angles with y in them need to add up to 180 degrees
10y + 3y + 11 = 180
Simplify:
13Y + 11 = 180
Subtract 11 from both sides
13y = 169
Divide both sides by 13
Y = 13
Now solve for those two angles:
10y = 10(13) = 130
3y + 11 = 3(13) + 11 = 50
The other two angles are the same as these.
The larger angles = 130
The smaller angles = 50
