Monday, February 24, 2014

Thursday, February 20, 2014

Something special about the law of sines?

The Law of Sines says that, in any triangle, the sine of an angle, divided by the length of the opposite side, is constant.
A question not asked in high school texts is this: is there something special about the value of that constant. Does it measure something? Is it a clue about anything?

or If you give up, click here!!!!

Thursday, February 13, 2014

12? or 13?

On this snowy day in the great northeast, it is time to practice our counting skills. Just count the number of people in this picture. After it moves, count again. Then go figure...



I got this a while back and have had it on my web page for years. I am still searching for a "neat" solution. Good luck!!

Thursday, February 6, 2014

Some practice, some play

Two parts today. the first part is for some practice for first year Algebra students. For the original GeoGebra file, click here. The second (see below) is just some doodling.

This may be a cartoon hat, a sketch of the space shuttle from underneath, or a side view of a bell. Whatever you may see or think of, it comes from just moving circles.

If you want to see the GeoGebra file itself, click here.

Wednesday, February 5, 2014


Everyone is a student and the only thing controlling that is their curiosity. Doodling itself can be a stimulus to curiosity. Here is my latest GeoGebra doodle from this morning. For a copy of the GeoGebra file, click here.
This second one is not a doodle. It is using a specific equation which I had seen somewhere on the web. When I can find it again I will give credit where credit is due. This is just a doctored version of the original. My GeoGebra file is here

Saturday, February 1, 2014