Search Me

Recent Posts
 Girls’ Angle Bulletin, Volume 8, Number 3
 We’ve Got Snowball Problems
 Happy New Year 2015!
 Girls’ Angle Bulletin, Volume 8, Number 2
 Go Digital! A Crossword Puzzle Raffle
 Girls’ Angle Bulletin, Volume 8, Number 1
 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
Categories
 applied math (3)
 Contest Math (23)
 gender issues (9)
 math (89)
 Math Education (74)
 Uncategorized (14)
 WIM videos (4)
Archives
 February 2015 (2)
 January 2015 (1)
 December 2014 (2)
 October 2014 (1)
 September 2014 (1)
 August 2014 (1)
 July 2014 (1)
 June 2014 (2)
 May 2014 (1)
 February 2014 (1)
 January 2014 (4)
 December 2013 (1)
 November 2013 (2)
 September 2013 (2)
 August 2013 (1)
 July 2013 (2)
 June 2013 (1)
 May 2013 (1)
 April 2013 (3)
 March 2013 (1)
 February 2013 (2)
 January 2013 (2)
 December 2012 (2)
 November 2012 (2)
 October 2012 (3)
 September 2012 (8)
 August 2012 (10)
 July 2012 (7)
 June 2012 (3)
 May 2012 (3)
 April 2012 (7)
 March 2012 (4)
 February 2012 (3)
 December 2011 (4)
 November 2011 (7)
 October 2011 (11)
 September 2011 (13)
 August 2011 (16)
Everything Math
AIME angles arctangent area calculus CEO chocolate circles Coach Barb combinatorics complex numbers computation conformal crossword cubes dates distance divisibility Emily Riehl errors exponentials Fermat's little theorem geometry Girls' Angle Girls' Angle Bulletin girls and math infinite geometric series Jean Pedersen Julia Zimmerman Kate Jenkins learning linear algebra mass points math math contests Math Doctor Bob mathematicians math event math magazine math prize for girls math problems math trivia math videos matrices mental computation multiplication optimization origami parabolas perpendicular perspective drawing puzzle Pythagorean theorem Pythagorean triples quadratic Radmila Sazdanovic raffle contest roots science secret messages similarity sine stable marriage algorithm stable marriage problem stereographic projection sumit sums of powers tennis triangles trigonometry USWIM variables Vieta's formulas volume Women's History Month
Tag Archives: area
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
Posted in math, Math Education, WIM videos
Tagged area, Bridget Tenner, equilateral triangles, lattice polygons, Pick's theorem
Leave a comment
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 FechtorPradines proves many interesting properties of the envelope of the set of … Continue reading
Manipulatives: Use With Caution!
Math manipulatives are concrete objects used as props in math education. As mere objects, they are, in and of themselves, not a bad thing. What is terrible is how they are often used in instruction.
Areas and Brownies
Recently at Girls’ Angle, we brought in a brownie and told the girls that nobody could have any until they figured out a way to dissect it so that everyone gets an equal share. I’ve done this activity before, but … Continue reading
Posted in math, Math Education
Tagged area, brownie, geometry, Petsi Pies, quadrilateral
Leave a comment
3D Trapezoids
A few days ago, I was discussing the area formula for a trapezoid with students who had just derived it for themselves. The discussion led to a neat generalization of the trapezoid to higher dimensions different from the one that envisions the 3D … Continue reading