△△△=○○○○○○=□□□△+□+○○=180↓○○=△△△,换去○○,得△+□+△△△=180○○○○=□□□=△△△△△△,↓□=△△↓△+□+○○=180↓△+△△+△△△=180↓△=30○=45□=60
令a=三角形b=圆c=方块3a=2b4b=3ca+c+2b=180a=30b=45c=60所以三角形=30圆=45方块=60