Search Me

Recent Posts
 Happy YP Day, HCSSiM!
 Girls’ Angle Bulletin, Volume 10, Number 5
 Girls’ Angle Bulletin, Volume 10, Number 4
 Math Intuition Test
 Girls’ Angle Bulletin, Volume 10, Number 3
 Happy New Year 2017!
 Girls’ Angle Bulletin, Volume 10, Number 2
 Chebyshev Polynomials of the First Kind
 Potatoes are made of ducks
 Girls’ Angle Bulletin, Volume 10, Number 1
 Measure Up – A Crossword Puzzle Raffle
 Virtual Reality!
Categories
 applied math (3)
 Contest Math (24)
 gender issues (9)
 math (109)
 Math Education (89)
 Uncategorized (21)
 WIM videos (4)
Archives
 July 2017 (1)
 June 2017 (1)
 April 2017 (2)
 February 2017 (1)
 January 2017 (1)
 December 2016 (2)
 November 2016 (1)
 October 2016 (2)
 September 2016 (1)
 August 2016 (1)
 June 2016 (1)
 April 2016 (1)
 February 2016 (2)
 January 2016 (1)
 December 2015 (1)
 October 2015 (1)
 September 2015 (1)
 August 2015 (2)
 June 2015 (2)
 May 2015 (1)
 April 2015 (1)
 March 2015 (1)
 February 2015 (2)
 January 2015 (1)
 December 2014 (2)
 October 2014 (1)
 September 2014 (1)
 August 2014 (1)
 July 2014 (1)
 June 2014 (2)
 May 2014 (1)
 February 2014 (1)
 January 2014 (4)
 December 2013 (1)
 November 2013 (2)
 September 2013 (2)
 August 2013 (1)
 July 2013 (2)
 June 2013 (1)
 May 2013 (1)
 April 2013 (3)
 March 2013 (1)
 February 2013 (2)
 January 2013 (2)
 December 2012 (2)
 November 2012 (2)
 October 2012 (3)
 September 2012 (8)
 August 2012 (10)
 July 2012 (7)
 June 2012 (3)
 May 2012 (3)
 April 2012 (7)
 March 2012 (4)
 February 2012 (3)
 December 2011 (4)
 November 2011 (7)
 October 2011 (11)
 September 2011 (13)
 August 2011 (16)
Everything Math
AIME angles arctangent area binomial coefficients calculus CEO Chebyshev polynomials chocolate circles combinatorics complex numbers conformal crossword cubes cyclotomic polynomials dates derivative Emily Riehl exponentials Fermat's little theorem finite fields geometry Girls' Angle Girls' Angle Bulletin girls and math infinite geometric series irreducible polynomials Jean Pedersen Julia Zimmerman Kate Jenkins learning linear algebra logic mass points math math contests Math Doctor Bob math event math games math magazine math prize for girls math problems math trivia math videos minimal polynomials multiplication optimization origami palindromes parabolas permutations perspective drawing probability puzzle Pythagorean theorem Pythagorean triples quadratic raffle contest roots science similarity sine stereographic projection sumit telescoping sum tennis tilings trapezoid triangles trigonometry USWIM variables Vieta's formulas volume
Tag Archives: mass points
Marion Walter’s Theorem Via Mass Points
I recently had the good fortune of learning Marion Walter’s theorem from Marion Walter herself: Marion Walter’s Theorem: In a triangle, draw line segments from each vertex to the trisection points on the opposite side. The six drawn line segments … Continue reading
Girls’ Angle Bulletin, Volume 7, Number 5
The electronic version of the latest issue of the Girls’ Angle Bulletin is now available on our website. A paraboloid of revolution adorns the cover. Anna investigates cross sections of paraboloids in this issue’s Anna’s Math Journal. It sure feels like … Continue reading
Posted in math, Math Education
Tagged Brahmagupta, Cailan Li, chicken mcnugget, cyclic quadrilateral, Frobenius coin problem, Johnny Tang, Kate Jenkins, Marie Vitulli, mass points, maximum subsequence, MIT's Aero/Astro, paraboloidal cross sections, permutations, quadratic reciprocity, Valeria Golosov
Leave a comment
Girls’ Angle Bulletin, Volume 7, Number 3
The electronic version of the latest issue of the Girls’ Angle Bulletin is now available on our website. Much of this issue is about the center of mass, including Julia Zimmerman’s cover drawing which features a mobile fantasy. In Math … Continue reading
Posted in math, Math Education
Tagged center of mass, gravity, Karen Smith, law of the lever, mass points, mobiles, vectors, WallaceBolyaiGerwien theorem, x to the x
Leave a comment