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怎样证明：圆中定弦定角围成的三角形，等腰时�长最大？ 知乎 Template






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sketch 5009 Elen Jager from Attack on Titan
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tomski怎样证明：圆中定弦定角围成的三角形，等腰时�长最大？ 知乎 coloring
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怎样证明：圆中定弦定角围成的三角形，等腰时长最大？ 知乎 sketch template
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怎样证明圆心角是圆角的一半？同弧对等角？圆内接四边形对角互补？ 知乎 sketch template
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