47th Proposition of Euclid Freemasonry Symbols Adjustable Open Ring

47th Proposition of Euclid is also known as Euclid's 47th Problem or the Pythagorean Theorem. It proves that the square of the two sides linked to the right angle in every right triangle is equal to the square of the third side, termed the hypotenuse. The 47th problem of Euclid represents the Masons' role in 'squaring their square' in Speculative Freemasonry. The term 'craft' refers to creating anything from scratch. Operational Freemasons used the emblem to establish solid foundations in construction. The symbol's mathematical representation is in the ratio 3:4:5.