Aprope
发表于 2025-3-28 16:38:01
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无关紧要
发表于 2025-3-28 19:32:01
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集合
发表于 2025-3-28 23:21:56
Stephen K. Rice,Michael D. Maltzs here; we call the tooi that does that a compass. Knowing the allowed use of the dividers, you should expect the definition below. For practice in formulating these definitions, you should write down the definition of a ruler and dividers point before you read any further.
indicate
发表于 2025-3-29 03:39:33
Participant-Observation as a Research MethodFerrari (1522–1565) showed in 1547 that all the constructions in Euclid’s . could be done with the ruler and rusty compass. In 1673, Georg Mohr wrote a little book that also proves the principal theorem of this chapter.
HALO
发表于 2025-3-29 09:20:42
The Ruler,thes apart to get a thread to pull taut is of theoretical interest but is not the most practical approach. Although reflections will not play the major role here that they did in the last chapter, the idea of a reflection does provide the construction of a straightedge. You have only to fold a sheet of paper; the crease forms a straightedge.