Author Archives: girlsangle

About girlsangle

We're a math club for girls.

A Counting Puzzle Raffle – Solution

Posted on May 1, 2013

Many thanks to all who participated in our counting puzzle raffle. The winner was selected randomly from correct entries and has requested to remain anonymous. Here’s a solution.

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Girls’ Angle Bulletin, Volume 6, Number 4

Posted on April 30, 2013

The electronic version of the latest issue of the Girls’ Angle Bulletin is now available on our website. The cover was made by Prof. Laura DeMarco, the subject if this issue’s interview.  To make it, she used the Dynamics Explorer Tool, … Continue reading →

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A Counting Puzzle Raffle

Posted on April 14, 2013

(Added May 1, 2013: This puzzle raffle is now closed. Many thanks to all who participated. Here’s a solution.) Last month, Girls’ Angle affiliates Rediet Abebe, Jordan Downey, and Lauren McGough hosted a mathophile raffle contest at the Girls’ Angle … Continue reading →

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The Pythagorean Theorem: Is It Proven?

Posted on April 7, 2013

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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Back to Basics: Equation Manipulation

Posted on March 18, 2013

I am posting this because I actually witnessed the following dialogue take place in a classroom: Teacher: To solve 7x + 3 = 12, first subtract 3 from both sides to get 7x = 9.  Next, divide by 7 on … Continue reading →

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Girls’ Angle Bulletin, Volume 6, Number 3

Posted on February 28, 2013

The electronic version of the latest issue of the Girls’ Angle Bulletin is now available on our website. The cover pertains to a rather hot topic at the club of late: divisibility.  Can you see how the cover relates to … Continue reading →

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Calculator Addiction

Posted on February 23, 2013

Here’s a test question to see if you have calculator addiction: What is 180 – 40? Did you feel an urge to reach for your calculator to compute that? If so, please continue reading this post. I was actually working … Continue reading →

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Cook up some math with Julia Child

Posted on January 31, 2013

Girls’ Angle’s twelfth session starts up soon and we’ll be welcoming some new members. Often, our newest members approach math with a great fear of making mistakes. But to learn math well, you can’t be afraid to make mistakes. Apparently, … Continue reading →

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Interview with the Institute of Mathematical Sciences in Madrid

Posted on January 3, 2013

Recently, I was interviewed about Girls’ Angle by Ágata Timón of the Institute of Mathematical Sciences in Madrid. The interview was conducted in English, but published in Spanish: Interview Introduction by Manuel de León Interview, Part 1 Interview, Part 2 … Continue reading →

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Girls’ Angle Bulletin, Volume 6, Number 2

Posted on December 31, 2012

The electronic version of the latest issue of the Girls’ Angle Bulletin is now available on our website. The cover features Red Sea Pearls, by Radmila Sazanović, a postdoctoral fellow in mathematics at the University of Pennsylvania.  You can also check … Continue reading →

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