Greatest Triangles: The 20-99-101
One entry from the 10 Greatest Triangles countdown: The 20-99-101.
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Free for classrooms, worksheets, slides and other non-commercial use under CC BY-NC 4.0, with credit to Ben Orlin.
Cartoon by Ben Orlin, Math with Bad Drawings. https://cartoons.mathwithbaddrawings.com/2025-10-08-the-10-greatest-triangles-of-the-21st-century--greatest-triangles-the-20-99-101/ (CC BY-NC 4.0)Transcript
#10: The 20-99-101. "Some call it a mere base-ten novelty. Others, an enduring classic. Hey, why not both?"