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This is much less rigorous, but I taught my students that numbers or measures can be equal, but objects--like segments, polygons, and angles--cannot be equal, they must be congruent. It was a distinction I gave particularly to help with proofs, where they often need to say two angle measures are equal (and use the equal sign) before saying the angles ...


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In Mandarin Chinese, numeral: 数字 number: 号码


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