I'm Bon Crowder and the photos above are both of me - in 1989 and today. I'm a Generation X mom of Generation Z kids.

I began peer tutoring in high school in 1984. MathFour.com is the 2015 version of me helping peers be comfortable in math.

If you're a Gen-X parent, you're in the right place!

Tag Archives: video

Pi Day Videos – Song & Limerick

March 14 is Pi Day. Mathematicians, teachers, and math geeks around the world celebrate.

Especially at 1:59. That’s when the date and time is 3/14 1:59 – pi to 5 digits.

My treat for you last year was a photo of pi decorated cookies. This year the treat is even more delicious – a Pi Song from Vi Hart and a Pi Limerick from me.

Vi Hart can sing!

You can’t deny Vi Hart has mathematical and creative talent. But who knew she had a musical voice!

My Pi Limerick – because I can’t sing.

I can’t carry a tune in a bucket much less associate digits with musical notes.

But I can remember pi to 5 decimal places with the help of this limerick:

Happy Pi Day, y’all! 

4 Responses to Pi Day Videos – Song & Limerick

  1. My highschool Trig teacher (Mr. Campbell — a good man!) taught us to remember the digits of pi by chanting the rhyme ‘sine, cosine, cosine, sine, 3.14159’.

    The order of sines and cosines refers to how to apply Euler’s formula to sine [e.g. sin(x+y) = sin(x)cos(y) + cos(x)sin(y)]. Though I had to look up the formula, I have *never* forgotten the rhyme!

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2 Responses to Variations on the Number 3

  1. A 3-sided polygon, a triangle, is the only “rigid” shape. Any polygon with more than 3 sides is not rigid because it can be easily deformed. A triangle, by contrast, is strong because it resists deformation. Therefore, triangles are often used in construction. For example, “trusses” are structures made of steel beams in the form of triangles. Often, many smaller triangles are welded together to form larger triangles for greater strength. Trusses are used wherever strength is needed: bridges and supports of all kinds. The Eiffel Tower is made of trusses consisting of thousands of steel triangle-shaped constructions.

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One Response to Area of a Right Triangle

  1. You are so entertaining; I chuckled a few times through this! But “that’s just going a bit too far” (as you might say). : )

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2 Responses to Permutations in Braiding Hair

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