一条线段,只用圆规和无刻度的直尺怎么做它的三等分线? 知乎 Template




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Try and sketch some of theseNeedle, Sideshow, Calliope, Nook, Amusement park, Ribbons, Campfire, Booth, Hand, Post office, view more ideas


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tomski一条线段,只用圆规和无刻度的直尺怎么做它的三等分线? 知乎 coloring