Field Notes on Word Problems 11-15-16
Field Notes on the Nature of Science 11-12-16
Notes on the Philosophy of Math Education 11–2–2016
Another Derivation of the Area of a Circle Formula
Take a really, really small line around the circumference, and lay it down horizontally next to the circle. Then take another line of circumference, and lay it down horizontally on top of the previous circumference line. Keep going like that, always laying lines down starting on the left, until you put the center dot on […]
Read MoreEtymology of “Second” (I.E., One-sixtieth of a Minute)
The interesting etymology of “minute” and “second.” I learned about “second” from Calculus Made Easy by Thompson. The word “second” came from the Latin “secunda pars minuta,” meaning “second diminished part.” ”one-sixtieth of a minute of degree,” also “sixtieth part of a minute of time,” late 14c. in geometry, from Old French seconde, from Medieval […]
Read More“Calculus Made Easy” by Silvanus P. Thompson
Calculus Made Easy (pub 1910), by Silvanus P. Thompson (1851-1916), has an excellent exposition of calculus. Mr. Thompson makes the ideas simple and intelligible while maintaining their meaning, essence, and power. You could download a free PDF on Project Gutenberg, or you could buy it on Amazon. HT: Hans S
Read MoreSnared By Contradictions, 2
Silly things said by people who say “math is stupid,” “math is useless,” or “I’ll never use this in life:”1. How much do I weigh?2. How much weight do I need to lose?3. Macy’s has a 30% off sale!4. How much medicine do I need to give my dog/cat?5. For how long do I need […]
Read MoreSnared by Contradictions
Silly things said by people who say “math is stupid,” “math is useless,” or “I’ll never use this in life:”1. What is my heart rate?2. Is my heart rate lower than yours after the 100-yard dash?3. What time is it?4. How long till we get there?5. How much insulin do I need?6. What is my yearly salary?7. What percent increase in salary […]
Read MoreA Mathematical Breakfast
I had: 2^0 bunch kale 2^1 purple potatoes 2^2 eggs 2^3 strips bacon. Yum. But it was not a sequence, as I did not eat it in that order. I destroyed the series.
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