When Will I Ever Use Math In Real Life?

Marc tells two stories of when he unexpectedly used math in his life outside of the classroom.
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Mathematics for Social Justice by Marc Roth.

[@chitlitlah]

I used to run a machine that cut shapes out of plate metal. It was made in 1981, so rather than being CNC, it used servo motors and a camera to follow a black line on one side while cutting with a propylene torch on the other side. Sometimes the shapes could be printed from CAD, but sometimes I had to draw them myself on backdrop paper using a magic marker, framing square, protractor, etc. You might not think it but I used trigonometry pretty often doing that job. The designs were often several feet wide and I didn't have a compass that could precisely measure angles across such a distance, so I had to use trig to convert to rectangular coordinates so I could use my square and tape measure instead. I used Pythagorean's theorem to check for squareness when my framing square wasn't large enough. There were many cases in which I had to cut a strip to be rolled into a circular arc but was only given the distance from end to end and the radius of curvature, so I had to calculate the unrolled length. I could've bugged the engineers every time I needed some dimensions, but I saved man-hours and felt much better being self-reliant.

[@achrace.profrichardachara]

Simple and short.

[@maloukemallouke9735]

thanks for share .

[@VACCINE-l4s]

♦I hope you dedicate a video to how *maths help set the traffic lights sequences* and what *equations* are used in this regard.
Thanks

[@scottguitar8168]

Maybe someone can get by without knowing math but it seems I encounter using math quite frequently. When I was a student pilot, my instructor had me keep track of each leg of my flight and my fuel consumption and I asked why? He said in case you encounter a stronger than expected head wind you'll know when to stop at a different airport to refuel. I said the plane has 3.5 hours of fuel on board, couldn't I just re-route at the 3 hr mark? He thought about it and said "yeah that works too." Look at all that math I cut out.