Answer:
x = 145° , y = 135°
Explanation:
the sum of the 3 angles in a triangle is 180° , then
x + 25° + 10° = 180°
x + 35° = 180° ( subtract 35° from both sides )
x = 145°
the exterior angle of a triangle is equal to the sum of the 2 opposite interior angles.
x is an exterior angle of the triangle containing y , then
y + 10° = x , that is
y + 10° = 145° ( subtract 10° from both sides )
y = 135°