Answer:
35° , 40° , 105°
Step-by-step explanation:
the sum of the 3 angles in the triangle = 180° , then
3x + x + 40 = 180 , that is
4x + 40 = 180 ( subtract 40 from both sides )
4x = 140 ( divide both sides by 4 )
x = 35
3x = 3 × 35 = 105
the 3 angle measures are 35° , 40° , 105°
