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The Guardian - UK
The Guardian - UK
Science
Alex Bellos

Can you solve it? Here’s (not) looking at Euclid

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The ancient Greek geometer Euclid presented a list of five axioms he held to be self-evidently true. They are (or are equivalent to):

  1. You can draw a line between any two points.

  2. You can extend lines indefinitely.

  3. You can draw a circle at any point with any radius.

  4. All right angles are equal.

  5. All triangles have internal angles that add up to 180 degrees.

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