<memo> A0の大きさ √2=1.4142135623730951... ∜2=1.189207115002721... 1:√2=length:width length→xと置くと √2x²=1000000 x=1000/∜2[mm]=840.8964152537146...[mm] length:840.8964152537146...mm width:1189.2707115002721...mm よってA0は841x1189のサイズ
