A.1-3. Length
1 in. = 2.540 cm
100 cm = 1 m (meter)
1 micron = 10−6 m = 10−4 cm = 10−3 mm = 1 μm (micrometer)
1 Å (angstrom) = 10−10 m = 10−4
μm
1 mile = 5280 ft
1 m = 3.2808 ft = 39.37 in.
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