Tag Archives: geometry

Cubes in one-point 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

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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

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Girls’ Angle Bulletin, Volume 7, Number 2

The electronic version of the latest issue of the Girls’ Angle Bulletin is now available on our website. In Bisection Envelopes, a paper to appear in the journal Involve, Noah Fechtor-Pradines proves many interesting properties of the envelope of the set of … Continue reading

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2013 AIME 2 Problem 10

I’ve been asked about the following problem from the 2013 AIME 2 a few times, so I decided to blog a couple of solutions for it: Given a circle of radius , let A be a point at a distance from … Continue reading

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The Pythagorean Theorem: Is It Proven?

Recently at the Girls’ Angle club, a girl asked: Has the Pythagorean theorem been proven? That was a terrific question! Unfortunately, I didn’t have time to discuss it as well or as fully as I would have liked. A lot of … Continue reading

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Bouncing in a U-Shaped Gallery

Consider the U-shaped hallway illustrated above. All angles are right angles and the numbers indicate the lengths of various walls. The figure is not drawn to scale. The problem is to send a point sized billiard ball located at the … Continue reading

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One-Fold Origami Puzzle Raffle – Solution

Congratulations to Philip H. for winning the One-Fold Origami Puzzle Raffle! Many thanks to all who participated! Here is Philip’s solution:

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Use Your Mind to Save Yourself Time

I’m looking forward to Games Night at the Math Prize for Girls coming up this weekend. I’ve been working with the author of “Mess or Math?” to create a really fun math activity and I hope many of you who … Continue reading

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Two Lady Bug Path Problems

The other day, I noticed a bunch of lady bugs walking in the grooves of a tiled floor.

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A Geometric Iteration with a Sylvester-Gallai Guarantee

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