Home > Appreciation, Geometry > More Triangle Appreciation

More Triangle Appreciation

It’s been a great week for special triangles.

Six days ago was a rare Equilateral Triangle day, four days ago we appreciated the 10-12-10 triangle, and today, 10/16/10, gives us another triangle to admire. 

It’s actually very closely related to the 10-12-10 triangle, which we saw is just two right triangles pasted together.

 Just cut along the dotted altitude:

Now rotate the two pieces:

Stick them back together along their common side of length 6:

Now flip, and voila!  Another triangle made by gluing two congruent right triangles together!

I’m running out of good triangles, so we may not appreciate another until December 10th.

Click here to see more Geometry.


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  1. October 19, 2010 at 9:04 am

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