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为什么椭圆内中点弦和等比例缩放后的椭圆（离心率一致）相切且切点是原中点？ 知乎 Template






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tomski为什么椭圆内中点弦和等比例缩放后的椭圆（离心率一致）相切且切点是原中点？ 知乎 coloring
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为什么椭圆内中点弦和等比例缩放后的椭圆（离心率一致）相切且切点是原中点？ 知乎 sketch template
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