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gnomon Gnomon for Pythagorean theorem. The marked off “carpenter's square”—comprising 3 groups of 3 dots each (3 × 3)—thus represents 32, which when added to 42 yields 52 (the total gnomon). sundial sundial
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barometer. Antique Barometer with readout. Technology measurement, mathematics, measure atmospheric pressure
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gnomon
Gnomon for Pythagorean theorem. The marked off “carpenter's square”—comprising 3 groups of 3 dots each (3 × 3)—thus represents 32, which when added to 42 yields 52 (the total gnomon).
sundial
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barometer. Antique Barometer with readout. Technology measurement, mathematics, measure atmospheric pressure
Fun Facts of Measurement & Math