Plane Geometry
Most of us have some education (and
training - like cutting angles when building things *) in plane geometry. Some
even know about spherical geometry, usually because of the "great circle
route" used by airplanes over long routes around the earth. Well a fellow
named Euclid (http://en.wikipedia.org/wiki/Euclid) had something to do with
these subjects. He lived thousands of years ago.
Another geek type person was
Pythagoras (http://en.wikipedia.org/wiki/Pythagoras). Even these days we use a
lot of his work, again from thousands of years ago. Some it was almost cult
type religious things which had a math base. Even where I live today, often the numbers phi
and pi come up when connecting mountain tops, for example. So some people interpreted
that as there was something religious
going on.
The intent of this post is just to
provide some information for the home school instructor, if they even choose to
use it.
* Once I had
to line up vehicles for a dog and pony show for a Secretary of Defense. Well I
used the 3-4-5 triangle method from thousands of years ago to plan it out over
the one mile route. Most of my fellow planners just had no idea, or so they
said. This info I had learned in the 10th grade, by the way.
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