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Quoted: I work with a person who holds a BS and MS in a hard science and an MBA. They asked me if the area of a circle was it's diameter squared. View Quote Shoulda told him if you divide by 4 and multiply by pi it is. |
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I always remembered it by saying Pi R Square, no Pie Are Round
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Quoted: Ive had to figure out an OD/circumference plenty of times, but I've never had to calculate area of a circle in my adult life for anything, and I would be hard pressed to do so without googling that (admittedly remedial) formula If we're making fun of educated people itt, I know of one who tried to knock out a plasma torch cut with his bare hand on a piece of 3/8" steel plate He was removed from the operations aspect of the company following that lol. View Quote If the pussy can’t bare hand a plasma cut then he should be removed. No pie for you. |
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Quoted: My FIL was an EE who owned several EE firms and did contract work for the DoD. The man was dangerous around electricity and could fuck up a car's electrical system just by checking the oil. View Quote To be fair, Electrical Engineering has about the same relationship to an electrician as a Mechanical Engineer does to a carpenter. I have both a Bachelor's and Master's degree in EE, and never took a single class which discussed household wiring, wire gauge requirements, or the usefulness of a circuit breaker in keeping things from catching fire, for instance. Electronic circuit analysis or the solid state physics behind a transistor - yes, took a whole lot of that, but never touched a soldering iron in college either. Mike |
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To be honest, i google circle & sphere area & volume because i don’t like to makes mistakes & i probably use this calculation 2-3x/yr.
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i don't remember formulas or equations
but then again, i don't think about coworkers on the weekend |
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Quoted: I had a surgeon tell me I was an idiot after he told me he had just got back from British Columbia and I told him I like that part of Canada. He thought BC was in the US. View Quote Did the surgeon misspeak & mean District of Columbia? I’m not the brightest in many things, but geography is where it’s at! |
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I know the formula.
Besides doing it in math class, I’ve never once in my life needed to calculate the area of a circle. |
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Quoted: Ive had to figure out an OD/circumference plenty of times, but I've never had to calculate area of a circle in my adult life for anything, and I would be hard pressed to do so without googling that (admittedly remedial) formula If we're making fun of educated people itt, I know of one who tried to knock out a plasma torch cut with his bare hand on a piece of 3/8" steel plate He was removed from the operations aspect of the company following that lol. View Quote If you do the area calculation of a L pizza (12") vs a M pizza (8") you'll realize the L is more than twice as much pizza. Follow me for more adult tips. You're welcome. |
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It’s been so long I forgot exactly. Anyway in this day and age why would anyone have to ask that question as it’s a few key ??strokes on the net.
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Circles are squares with the corners knocked off. 0.7854 baby!
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Area and volume calculations are one of the only things I remember from math courses in Jr high.
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A=3.14 x r²
C=3.14xD FYI, a 30cal bore is roughly double that of a .22 bore, hence why powder burn is so much more efficient with 300BLK |
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Pie times radius squared, the units comes out in squares of whatever
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Quoted: Because it yields lower numbers and people are dumb. View Quote View All Quotes View All Quotes Quoted: Quoted: Quoted: 8 slices. Why do they do calorie count for six slices? eight slices is the norm. Because it yields lower numbers and people are dumb. Attached File |
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I learned it in school.
But that was 50 years ago. I don’t think I've used it since college. That's a long time to remember something you don't use. Seems like the perfect use of Google. pi times the radius squared (A = p r²). |
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Quoted: (Length x Width).7854 A circle takes up 78.54% of a square. https://www.ar15.com/media/mediaFiles/420595/6B2AD102-4F37-4869-B5BD-183060686AC2_jpe-2260247.JPG View Quote time thickness equals cubic yardage |
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Quoted: I always remembered it by saying Pi R Square, no Pie Are Round View Quote That's how my 6th grader remembers it too. I use geometry a lot. Advanced math seems to have evaporated over the last 30 years of never using it. Different world now anyway, way more information than you could ever learn, and all on search engine. |
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Didnt even take classes in school that showed me the formula. Never had the need to figure out the area inside a circle.
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If you want to check just where on the moron scale they fall, ask them if they know how to calculate the volume of a cylinder after you've told them how to calculate the area of a circle.
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Quoted: A friend of mine was studying for his Professional Engineer exam. He asked me what the equation was for the volume of a sphere, so I told him. He stared at me for a couple of seconds and then asked "Why the fuck do you know that?" I don't know. I just do. View Quote I hope your friend studied a little more before taking the PE. |
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Quoted: Never since December 1974, the last time I took a math class, have I ever had the need to calculate the area of any circle. View Quote |
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Quoted: If you do the area calculation of a L pizza (12") vs a M pizza (8") you'll realize the L is more than twice as much pizza. Follow me for more adult tips. You're welcome. View Quote I know a Wendy's small chili is the same volume as their large chili. I know a small and large beer at most stadiums is the same amount of beer. I'm cognizant of the difference in volume of a 10" round pizza vs a 14" round pizza, but the day I argue with my wife over that with math, turns into the night I sleep on my couch |
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I loathed math in school, however, pie r squared burnt into my brain as "Square pie", which was kinda funny, so I remember it.
I was the asshole kid who would "never use this in real life". Now I own a business and train people to calculate annular capacity, which is just a shitload of geometry. |
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To be honest after doing so many classes and such on shaft design this past semester I am used to the diameter based area equation. It is generally much more convenient.
A = pi/4 *d^2 but I assume by the OP you mean he thought it was A=d^2 |
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