constructible numbers
... that an equivalence between algebraic and geometric definitions of constructible numbers helps prove the impossibility of squaring the circle?
... that an equivalence between algebraic and geometric definitions of <b id="mwAWE"><a href="./Constructible_number" id="mwAWI" rel="mw:WikiLink" title="Constructible number">constructible numbers</a></b> helps prove the impossibility of <a href="./Squaring_the_circle" id="mwAWM" rel="mw:WikiLink" title="Squaring the circle">squaring the circle</a>?