I love the Unit Circle…so much I have a Unit Circle clock!
If you want to see how easy it is to memorize, here you go!:
Short version: All you have to do is memorize five values…
Warning: Unscripted!
Euclid’s Elements – Book 1 Proposition 3
Our third excursion in the “Video Safari of Euclid’s Elements”!
We have two straight lines, one bigger than the other. How do we cut a piece out of the longer one equal to the length of the shorter one? (Or as Euclid’s Elements: All Thirteen Books Complete in One Volume puts it: “Given two unequal straight lines, to cut off from the greater a straight line equal to the less.”
Ready to drive into the mathematical wild?
Hop on the Land Cruiser!
The GeoGerbra link is available here.
This is a relatively short proof. It needs more cowbell.
Thanks for watching!
P.S. The YouTube “Video Safari of Euclid’s Elements” is here, and Math.Promo’s page for it is here.
Euclid’s Elements – Book 1 Proposition 2
Our second trek in the “Video Safari of Euclid’s Elements”!
We have a point and we have a line segment apart from that point. How do we draw a line segment from that point that is exactly the same length as the original line segment? (Or as Euclid’s Elements: All Thirteen Books Complete in One Volume puts it: “To place at a given point a straight line equal to a given straight line.”
Ready to go into the mathematical wild?
Hop on the Land Cruiser!
The GeoGerbra link is available here.
I had a heck of the time getting the green screen lighting right…and I may be noticeably tired (it’s headin’ toward midnight). But, I did get to use the smiley-face bell the first time! 🙂
Thanks for watching!
P.S. The YouTube “Video Safari of Euclid’s Elements” is here, and Math.Promo’s page for it is here.
Euclid’s Elements – Book 1 Proposition 1
Our first video in the “Video Safari of Euclid’s Elements”!
If we have a line, how do we create a true, equilateral triangle? (Or as Euclid’s Elements: All Thirteen Books Complete in One Volume puts it: “On a given finite straight line to construct an equilateral triangle.”
With no ruler! ‘Cause a ruler wouldn’t be exact regardless. Ready to climb on the Land Cruiser and go into the mathematical bush?
Hop on!
Okay, it was a little rough…but it’s my first time trying out a few things…and you didn’t get eaten by a lion…so, they’ll get smoother. 🙂
Thanks for watching!
P.S. The YouTube “Video Safari of Euclid’s Elements” is here, and Math.Promo’s page for it is here.
First Math.Promo Tutorial Video!
Woo hoo!
It’s rough.
It’s clearly done by a newbie.
But we have produced our first “how to” tutorial video. Ever wondered how to solve the side-side-angle ambiguous case with a triangle?
Haven’t we all?!
Well, here is how to do it… [Read more…]