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 Multiplication Sculptures and Sums of Cubes
 Girls’ Angle Bulletin, Volume 7, Number 6
 Marion Walter’s Theorem Via Mass Points
 Girls’ Angle Bulletin, Volume 7, Number 5
 Cubes in onepoint perspective
 Girls’ Angle Bulletin, Volume 7, Number 4
 Girls’ Angle Bulletin, Volume 7, Number 3
 Intuiting the Chain Rule
 WIM Video: Pick’s Theorem
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 Girls’ Angle Bulletin, Volume 7, Number 2
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Author Archives: girlsangle
Multiplication Sculptures and Sums of Cubes
Take a multiplication table and build a column of cubes over each entry. For each column, use as many cubes as the product it sits upon. The result is a “multiplication sculpture” or “multiplication tower.” The picture shows a 15 by … Continue reading
Girls’ Angle Bulletin, Volume 7, Number 6
The electronic version of the latest issue of the Girls’ Angle Bulletin is now available on our website. The cover illustrates a neat result that Anna B. discovered and explains in this issue’s Anna’s Math Journal. She continued her investigation of … Continue reading
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
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Cubes in onepoint perspective
This post is a reply to Jamie’s comment on Drawn to Math: Would anyone know how to construct a cube in one point perspective? This is an excellent question because it isolates an important, simplified situation that enables one to study key aspects of … Continue reading
Posted in applied math, math
Tagged cubes, geometry, onepoint perspective, perspective drawing, similarity
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Girls’ Angle Bulletin, Volume 7, Number 4
The electronic version of the latest issue of the Girls’ Angle Bulletin is now available on our website. The cover features a planar configuration by Leah Berman, associate professor of mathematics at the University of Alaska Fairbanks. There are 240 … Continue reading
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
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