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- Q6786859 subject Q6812555.
- Q6786859 subject Q8266666.
- Q6786859 abstract "A mathematical instrument is a tool or device used in the study or practice of mathematics. In geometry, construction of various proofs was done using only a compass and straight edge; arguments in these proofs relied only on idealized properties of these instruments and literal construction was regarded as only an approximation. In applied mathematics, mathematical instruments were used for measuring angles and distances, in astronomy, navigation, surveying and in the measurement of time. Instruments such as the astrolabe, the quadrant, and others were used to measure and accurately record the relative positions and movements of planets and other celestial objects. The sextant and other related instruments were essential for navigation at sea. Most instruments are used within the field of geometry, including the ruler, dividers, protractor, set square, compass, ellipsograph, T-square and opisometer. Others are used in arithmetic (for example the abacus, slide rule and calculator) or in algebra (the integraph). In astronomy, many have said the pyramids (along with Stonehenge) were actually instruments used for tracking the stars over long periods or for the annual planting seasons.".
- Q6786859 thumbnail Astrolabe_(PSF).png?width=300.
- Q6786859 wikiPageWikiLink Q102066.
- Q6786859 wikiPageWikiLink Q103896.
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- Q6786859 wikiPageWikiLink Q5284052.
- Q6786859 wikiPageWikiLink Q626974.
- Q6786859 wikiPageWikiLink Q6812555.
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- Q6786859 wikiPageWikiLink Q8087.
- Q6786859 wikiPageWikiLink Q816425.
- Q6786859 wikiPageWikiLink Q8266666.
- Q6786859 wikiPageWikiLink Q841280.
- Q6786859 wikiPageWikiLink Q952519.
- Q6786859 comment "A mathematical instrument is a tool or device used in the study or practice of mathematics. In geometry, construction of various proofs was done using only a compass and straight edge; arguments in these proofs relied only on idealized properties of these instruments and literal construction was regarded as only an approximation. In applied mathematics, mathematical instruments were used for measuring angles and distances, in astronomy, navigation, surveying and in the measurement of time.".
- Q6786859 label "Mathematical instrument".
- Q6786859 depiction Astrolabe_(PSF).png.