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First Failed Attempt: Sides Too Short

0:09
1:07
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At 0:09 in

Triangle Tuesday

What happens here

The presenter manipulates the 6-inch, 5-inch, and 24-inch boards to attempt to form a triangle. He positions the two shorter boards at an angle, trying to bring their ends together over the longest board, but they visibly fail to connect. This illustrates that their combined length (11 inches) is too short to span the 24-inch base, thus a triangle cannot be formed.

Goal: Visually demonstrate that if the sum of two sides is less than the third, a triangle cannot be formed

Tools and materials

  • Wooden Board

What they say

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People think that any three boards can make a triangle. Well, let's get after it. I got a 6-in board, a 5-in board, and a 24-in board. Do these make a triangle? Obviously not, right? 5 + 6 = 11. That is smaller than 24. Now, what if they're equal? I got 12, 12, and 24. 12 + 12 = 24. Does that work?

Auto-generated from the video audio.