Group items tagged triangle - Westminster math

Which Triangle is More Equilateral? « Mr Honner - 0 views

mrhonner.com/...h-triangle-is-more-equilateral

triangle isosceles equilateral area

shared by Chris Harrow on 11 Oct 11 - No Cached

Chris Harrow on 11 Oct 11

Really interesting question that provokes so many more - How would you answer Honner's question? - Which has greater area? - Is there a pair of isos triangles whose areas are = if switched as these two are?

<div class="cArrow"> </div><div class="cContentInner">Really interesting question that provokes so many more - How would you answer Honner's question? - Which has greater area? - Is there a pair of isos triangles whose areas are = if switched as these two are?</div>

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Fun With a Favorite Triangle « Mr Honner - 0 views

mrhonner.com/...fun-with-a-favorite-triangle

geometry triangle regents lawofcosines

shared by Chris Harrow on 26 Aug 11 - No Cached

Chris Harrow on 26 Aug 11

A cool triangle problem with multiple solution approaches.

<div class="cArrow"> </div><div class="cContentInner">A cool triangle problem with multiple solution approaches.</div>

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Two Symmetric Triangles Are Directly Equidecomposable IV - 2 views

www.cut-the-knot.org/...DecoSymmetry4.shtml

geometry math proof kite isosceles triangle

shared by Chris Harrow on 15 Oct 11 - No Cached

Can you cut an arbitrary triangle into pieces so that the pieces can be rotated and translated (but not flipped) so as to form the mirror image of the given triangle? It can be done in just two cuts.
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Chris Harrow on 15 Oct 11

This is a very cool problem. Be sure to check out this solution and the quadrilateral version (http://www.cut-the-knot.org/Curriculum/Geometry/DecoSymmetry3.shtml)

<div class="cArrow"> </div><div class="cContentInner">This is a very cool problem. Be sure to check out this solution and the quadrilateral version (<a href="http://www.cut-the-knot.org/Curriculum/Geometry/DecoSymmetry3.shtml" rel="nofollow" target="_blank">http://www.cut-the-knot.org/Curriculum/Geometry/DecoSymmetry3.shtml</a>)</div>

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Introducing a Super-Heronian triangle | Fun With Num3ers - 0 views

benvitalenum3ers.wordpress.com/...cing-a-super-heronian-triangle

heronian triangle geometry

shared by Chris Harrow on 01 Apr 12 - No Cached

Star of David Theorems in Pascal Triangle | CTK Insights - 0 views

www.mathteacherctk.com/...id-theorems-in-pascal-triangle

star of David combinations combinatorics pascal proof

shared by Chris Harrow on 21 Dec 11 - No Cached

I am not sure who coined the term "The Star of David Theorem" to designate the identities discovered in the early 1970s. There are in fact two of them, both related to the "Star of David" configuration in Pascal triangle
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Triangle Angle Sum - 0 views

mathematicsbhilai.blogspot.com/...gle-angle-sum-property-ii.html

triangle angle sum geogebra

shared by Chris Harrow on 30 Jan 12 - No Cached

Chris Harrow on 30 Jan 12

OK, this cool looking demo seems to totally give away the answer, but does it? How many students will ask if this PROVES the sum, or just provides something that strongly suggests a sum?

<div class="cArrow"> </div><div class="cContentInner">OK, this cool looking demo seems to totally give away the answer, but does it? How many students will ask if this PROVES the sum, or just provides something that strongly suggests a sum?</div>

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11/11/11 - Equilateral Triangle Day! « Mr Honner - 1 views

mrhonner.com/...11111-equilateral-triangle-day

proof without words equilateral triangle

shared by Chris Harrow on 11 Nov 11 - No Cached

Vi Hart: Blog: Entry - 1 views

vihart.com/...doodling-triangle-party

triangle vi hart doodle fractal

shared by Ellen Vesey on 08 Dec 11 - No Cached

Ellen Vesey on 08 Dec 11

Another good doodling video from Vi Hart

<div class="cArrow"> </div><div class="cContentInner">Another good doodling video from Vi Hart </div>

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Math Forum - Ask Dr. Math - 0 views

mathforum.org/...65670.html

math geometry area proof pick theorem

shared by Chris Harrow on 10 Aug 11 - No Cached

The usual way to prove Pick's Theorem uses induction, by first proving it for triangles, and then proving the theorem for all polygons by dividing them into triangles. Here are several pages that present versions of this proof:
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Approximations with Pythagorean triangles - The Endeavour - 0 views

www.johndcook.com/...ons-with-pythagorean-triangles

pythagorean triples geometry algebra quadratic angles trigonometry

shared by Chris Harrow on 02 Sep 11 - No Cached

Fixed Point in Isosceles and Equilateral Triangles - 0 views

www.cut-the-knot.org/...AnonymousVisitor.shtml

geometry Pythagorean point GSP dynamic proof

shared by Chris Harrow on 08 Aug 11 - No Cached

Twitpic - Share photos and videos on Twitter - 1 views

twitpic.com/6zstoi

geometry math isosceles triangle