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20/20 Snellen Chart

20/20 Snellen Chart - Watch the official 20/20 online at abc.com. Dive into the magic of 20 now! In some countries, the number 20 is used as an index in measuring visual acuity. How is 20 spell, written in words, interesting facts, mathematics, computer science, numerology, codes. Make sure to invite your guests in. Get exclusive videos, blogs, photos, cast bios, free episodes In general, the number 20 represents quantity or value in mathematics, counting, measurements, and various other fields. It is a convex regular polyhedron composed of twenty triangular faces, with five meeting at each of the twelve vertices. 20 in roman numerals and. The meaning of the number 20:

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