Look for the y-intercept where the graph crosses the y-axis. Look for the x-intercept where the graph crosses the x-axis. Look for the zeros of the linear function where the y-value is zero.
Well we know these two angles are congruent, so we set their angles equal to each other. 5w - 69 = w + 3 4w = 72 w = 18 Now we plug w back into one of the equations, and then multiply whatever number we get by 2. 18 + 3 = 21 21 x 2 = 42 The measure of STU is 42°