The Lost Math Lessons

As a high school math teacher, I often run across or develop math ideas that are not taught in a typical math curriculum. Here are some of those ideas.

Showing posts with label conics. Show all posts

Tuesday, May 19, 2020

Circles of Apollonius of a Triangle

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Let’s investigate all triangles in which one side length is twice another side length and the third side length is a constant length of 9. S...

Tuesday, December 20, 2016

The Imaginary Part of a Parabola

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Parabolas are commonly taught in most high school algebra classes. All parabolas are curves defined by a quadratic equation and are symmetr...

Friday, January 15, 2016

Astroids

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Imagine a ladder falls down so that the top of the ladder slides down the wall and the base of the ladder slides along the ground away from...

Thursday, December 24, 2015

Church Window Design

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Last week while I was waiting to pick up my kids from their school carpool line, I noticed that all the windows in the church building had ...

Friday, January 16, 2015

Areas of Conics

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Most of us know area formulas for basic geometrical objects, such as circles, squares, rectangles, and triangles. (The area of a circle is...

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David Vreken

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