Category Archives: math

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

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Intuiting the Chain Rule

If you’ve just learned the chain rule but feel that you have no intuition for it, this post might help. Recall that the chain rule tells us how to compute the derivative of a composite function. Specifically, suppose and  are … Continue reading

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WIM Video: Pick’s Theorem

In our latest WIM Video, Depaul University Associate Professor of Mathematics Bridget Tenner discusses Pick’s theorem. The Girls’ Angle WIM Video series is the brainchild of Girls’ Angle director Elisenda Grigsby. WIM Videos are often shot on the spur of the moment … Continue reading

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Do you believe this?

Here’s a triangle: I’ll use the vertex labels to also denote the corresponding angle measures. Take the sines of all 3 angles in the triangle: , , and . Would you believe it if I told you that these three … 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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Girls’ Angle Bulletin, Volume 7, Number 1

The electronic version of the latest issue of the Girls’ Angle Bulletin is now available on our website. The cover shows an example of (quasi) self-similarity in nature: the Romanesco broccoli, and alludes to this issue’s Math Buffet.  Flip over … Continue reading

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Uncritical Thinking

A friend sent me the challenge at right that his daughter was given in school. What would you answer?

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Girls’ Angle Bulletin, Volume 6, Number 6

The electronic version of the latest issue of the Girls’ Angle Bulletin is now available on our website. The cover features a perspective drawing of the Back Bay by master painter Joel Babb. Last issue’s Summer Fun problem sets included … Continue reading

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Why is the area under one hump of a sine curve exactly 2?

I was talking with a student recently who told me that he always found the fact that amazing. “How is it that the area under one hump of the sine curve comes out exactly 2?” He asked me if there is … Continue reading

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HCSSiM!

I recently returned from teaching a workshop at HCSSiM. It was a blast! I tip my hat to David Kelly for creating such an awesome experience. If you’re a high school student who loves math and wants to add your … Continue reading

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