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 a set of perspective drawing problems, one of which asked for a perspective drawing of a cityscape. The cover could be considered a sample solution to that problem. Members and subscribers: We’d love to see your cityscapes too!

In this issue’s interview, meet the Louise Wolff Kahn Professor Emerita in Mathematics and History of Science and Technology at Smith College, Marjorie Senechal. In this interview, she discusses mathematics, some of her mathematical experiences, how she goes about solving math problems, how she came up for the title of her biography of Dorothy Wrinch, and much more.

UC Berkeley astrophysicist Aaron Lee contributes this, and next, month’s Math In Your World. He writes about the orbits of celestial bodies and explores the polar equation that describes them. This two-part series anticipates the arrival of Comet ISON, which may become visible to the naked eye in November.

In addition to regular columns *Anna’s Math Journal*, *Errorbusters!*, and *Coach Barb’s Corner*, find solutions to the five Summer Fun problem sets from the previous issue. Read how to thwart meddling gnomes, learn Vieta’s formulas, explore Gauss’ generalization of Wilson’s theorem, explore two extensions of the integers, and get a firm grasp of the basics of perspective drawing.

Finally, a reminder: when you subscribe to the Girls’ Angle Bulletin, you’re not just getting a subscription to a magazine. You are also gaining access to the Girls’ Angle mentors. We urge all subscribers and members to write us with your math questions and solutions to the Summer Fun problem sets or anything else in the Bulletin or having to do with mathematics in general. We will respond. We want you to get active and *do* mathematics. Parts of the Bulletin are written to induce you to wonder and respond with more questions. Don’t let those questions fade away and become forgotten. Send them to us!

We continue to encourage people to subscribe to our print version, so we have removed some content from the electronic version. Subscriptions are a great way to support Girls’ Angle while getting something concrete back in return. We hope you subscribe!

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