Exactly what is a saccheri quadrilateral? I can't find anyone who has heard of them. ... From: mcyberliver To: geometry@yahoogroups.com Sent: Saturday, July...
Saccheri was trying to prove the parallel postulate using his quadrilaterals. It turned out that he could NOT prove that the fourth angle was a right angle...
An isosceles trapezoid is a convex quadrilateral that has one pair of opposite sides that have equal lengths and a second pair of opposite sides that are...
A Hindu mathematician of the seventh century, named Brahmagupta, discovered a formula for the area of a quadrilateral whose vertices lie on a circle. It is ...
... wrote: A bricklayer has eight bricks. Seven of the bricks weigh the same amount and one is a little heavier than the others. If the bricklayer has a...
If our present material universe is 10 to 20 billion years of age,and if we compare that age with the infinite age of the endless space that houses this...
Instead of doing his geometry assignment, Michael decided to blow some soap bubbles. One of them turned out to look like a "double bubble". Now suppose that...
Space and time ... There are two theories or convictions centered around the existence or creation of our present universe,and life altogether: The first one...
Dear Sir or Madam, I took your email group addresses from some Yahoo Groups, groups related to geometry. Sorry about that. I'm a MSc student at HWU, and I'm...
... Solution: Place three bricks on each scale. If one side tips, take two of the three on the heavier side, and if they don't tip, the heaviest one is the...
... All these problems with weighings are just an expansion of base 3, because the weighing returns a "trit": 0, 1 or -1. I once imagined a problem to pose to...
... <mcyberliver@y...> wrote: Our group is devoted to the study of Single and Multi-variable calculus. Topics open for discussion include: limits and...
hello all, my name is adi, i came from indonesia. my lecturer gave me this problem.. an ellipse construction. please see the MS Word attachment file.. or you...
My guess is that "e" denotes the eccentricity (c/a) of the ellipse, "c" is a focal length and "a" is the semimajor axis. Another relation between "c" and "a"...
... I didn't understand what you _really_ want; maybe this may help: Start with a line L and an external point F Let K be the set of points P [we call it...
Hi Please let me know where I can find the condition that will imply that a given polygon circumscribes a conic. I am specially interested in hexagons...
Can you believe I refinanced my mortage and am saving $306 a month? Check it out... http://edgelending.com/?partid=rcc2 If you dont want to be part of this...
RE: Barycentric Coordinate Problem: I’m not sure whether this is an easy one or a hard one, but I’m stuck on it. To my surprize, I have not yet found...
Hi Jeremy ... You can calculate the angle BOC if you can find length BC. If A' is the mid-point of BC then let lengths a = OA' = OA/2 b = OB c = OC d = BA' =...
Hi Jeremy ... I don't follow your reply. In my post I gave a calculation for finding the length of BC from the lengths OA, OB and OC. Doesn't that solve your...
... Out of interest I substituted back in the original terms for a, b, c, d, used the Cosine rule for triangle OBC, and got Cos BOC = ( OA^2 - OB^2 - OC^2 ) /...
... I REPLY: There is something wrong with your “cos BOC = etc” formula, since, as length OA increases or decreases, your value for Cos BOC would change,...
What exactly are barycentic coordinates? Do you have the word spelled correctly, as I can't find a definition anywhere? If the topic is "Physics" vectors, I...
Please disregard my post---after doing a web search, I just learned I know nothing about barycentic coordinates. Carl Adkins ... From: Carl Adkins To:...
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