With Pi Day just around the corner, let’s remember what Pi is all about.
After washing your hands thoroughly, cut the crust off a pizza pie and lay it across four others. You’ll see that the crust spans a little more than 3 pies. That’s Pi ≈ 3.14.
But that’s not all! (Cont’d)
After washing your hands thoroughly, cut the crust off a pizza pie and lay it across four others. You’ll see that the crust spans a little more than 3 pies. That’s Pi ≈ 3.14.
But that’s not all! (Cont’d)
2/ Remember that
Area = Pi r^2
formula for a circle? That’s not really the formula. It should be:
Area = radius x (half circumference),
where circumf=Pi*diameter, so half of that is Pi*radius.
Proof: cut your pizza into small slices and arrange into an r x (C/2) rectangle...
Area = Pi r^2
formula for a circle? That’s not really the formula. It should be:
Area = radius x (half circumference),
where circumf=Pi*diameter, so half of that is Pi*radius.
Proof: cut your pizza into small slices and arrange into an r x (C/2) rectangle...
3/ Plenty more fun to be had, and will be had at @MoMath1’s pre-Pi Day Family Friday, a week from today. Register here: momath.org/civicrm/?page=…
Q: What’s the volume of a cylinder with height a and radius z?
A: Pi z z a!
(With thanks to the @RutgersU math grad student seminar!)
Q: What’s the volume of a cylinder with height a and radius z?
A: Pi z z a!
(With thanks to the @RutgersU math grad student seminar!)
PS if you want to read more about Pi, try last year’s thread:
#PiDay #MTBoS #iteachmath
(Thanks for the offline reminder to use hashtags. I’ll learn one of these days...)
#PiDay #MTBoS #iteachmath
(Thanks for the offline reminder to use hashtags. I’ll learn one of these days...)
