The other two problems from antiquity are "duplicating the cube" (constructing the length of the side of a cube that would have half the volume of a cube of a given side, effectively constructing the number cube root of 2) and "trisecting an angle". These three problems were finally shown to be unsolvable by straightedge and compass with the algebraic tools of the 19<sup>th</sup> century. | The other two problems from antiquity are "duplicating the cube" (constructing the length of the side of a cube that would have half the volume of a cube of a given side, effectively constructing the number cube root of 2) and "trisecting an angle". These three problems were finally shown to be unsolvable by straightedge and compass with the algebraic tools of the 19<sup>th</sup> century. |