'The Pythagorean theorem is the 47th proposition in the first book of his "Elements"'
Euclid
47: The Pythagorean theorem is the 47th proposition in the first book of his Elements
The Pythagorean theorem is the 47th proposition in the first book of his "Elements"
The Pythagorean theorem is the 47th proposition in the first book of his "Elements"
47
Euclid
47