Category Archives: Geometry

An angle inscribed in a semicircle

Posted on November 1, 2020 by drjimo

Hereis a tweet with a nice proof of the theorem that is the namesake of this website https://twitter.com/professorbrenda/status/1323095111954288640?s=21

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Roots of Unity

Posted on March 5, 2018 by drjimo

on GeoGebra https://www.geogebra.org/m/sZFwAZfs

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Hidden Figures Curriculum for Schools

Posted on April 17, 2017 by drjimo

Check out http://mentalfloss.com/article/94297/hidden-figures-coming-classrooms Free download of a curriculum based on the movie Hidden Figures.

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Free Worksheets site – Kuta

Posted on April 26, 2016 by drjimo

https://www.kutasoftware.com/freeipa.html

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Memoranda Mathematica: A Synopsis of Facts, Formulae, and Methods (1912 book)

Posted on August 10, 2015 by drjimo

At this the MathFest (Washington DC 2015) lecture by Richard Guy and John Conway I learned of a book from 1912. Probably only of interest to math geeks. (yep math geek alert) I find it interesting that this reference book … Continue reading →

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Great Reference Sheets (Math)

Posted on June 5, 2015 by drjimo

EEWeb has a very good Math Help page with numerous Quick Reference Sheets Algebra – Properties Geometry – Shapes and Solids Trigonometry – Definition (has unit circle) Trigonometry – Laws and Identities Calculus – Derivatives and Limits Calculus – Integrals … Continue reading →

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Spotting Numbers and Visual Patterns

Posted on March 27, 2015 by drjimo

Here a two great websites that provide lots of great pattern problems. Spotting Numbers Visual Patterns These patterns can be used with elementary students (if you just ask number questions) through advanced algebra (if you include questions about functions). Mathematics … Continue reading →

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On Symmetries of an Icosahedron

Posted on February 28, 2015 by drjimo

  http://math.ucr.edu/home/baez/six.html http://math.ucr.edu/home/baez/week79.html Click to access kostant.pdf http://www.ams.org/notices/199509/index.html symmetries of the cube: https://www.math.lsu.edu/~verrill/teaching/discrete2020/Spring2005/cubesolution.pdf http://www.ams.org/samplings/feature-column/fcarc-cubes7

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