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How long is the blue line?
Great, you answered "80 cm".
See here what other people have answered:
- 64 cm
- 77 cm
- 80 cm
- 83 cm
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Interesting fact:
Although the knowledge of a² + b² = c² for a right triangle predate the Greek philosopher, Pythagoras is credited with the first recorded proof of the theorem. The famed mathematician also had other hobbies. Like creating a sect. That’s right, he was the leader of a religious colony in Italy! He also developed a cup that allows you to drink only in moderation.