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CURIOSITY_UNFOLDED on Instagram: "Why A4 Paper Has a Magic Ratio! 📏✨ The A-series paper format (A4 to A0) is designed using the ISO 216 standard, which is based on a precise geometric principle: the aspect ratio of every sheet is √2 : 1 (≈1.414). This ratio is unique because when a sheet is cut or folded exactly in half, the resulting piece retains the same aspect ratio as the original. That means: • A4 (210 × 297 mm) folded → becomes A5 • A4 doubled → becomes A3 • A3 doubled → becomes A2 • …co
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CURIOSITY_UNFOLDED on Instagram: "Why A4 Paper Has a …
1.9M views6 months ago
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