Because I prefer to remain retired after a career as an engineer. I value my time more than my money at age 71. I also very much enjoyed helping this young man learn an important lesson.
Does your comment reflect the opinion that nobody but engineers can profit from an understanding of high school geometry?
Yep, what does your mechanic know about geometry today? If he can't explain the fundamentals of the Pythagorean theorem then he doesn't know squat about that math and you taught him nothing........Nice try.