The values of x and y are 85° and 65° respectively.
In the smallest triangle the third angle is
180 - ( 90+20)
= 180 - 110
= 70°
Therefore x
x = 180 - ( 70 + 25)
x = 180 - 95
x = 85°
To calculate the value of angle y
x = 20 + y ( exterior angle theorem)
85 = 20 + y
y = 85 - 20
y = 65
Therefore, the values of x and y are 85° and 65° respectively.