180 - 103 = 77 ( we need to find w and since 103 is supplementary angles with angle w they equal to 180) !! THE WHOLE TRIANGLE MUST EQUAL TO 180 !! now we have two of the interior angles, we need to add them and subtract it with 180. 77 + 87 = 167 ( we are adding angles x and w) 180 - 167 = 16 ( we are subtracting the total and the sum of the angles x and w)
THE MEASURE OF ANGLE Y IS 16 degrees!! hope this helps
