如何证明圆内接四边形对角线之积等于对边的乘积和 知乎 Sketch Coloring Page

如何证明圆内接四边形对角线之积等于对边的乘积和 知乎 Template

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tomski如何证明圆内接四边形对角线之积等于对边的乘积和 知乎 coloring

用两种方法证明“圆的内接四边形对角互补”．已知：如图�，四边形ABCD内接于⊙O．求证：∠B＋∠D＝180°．证法1：如图�，作直径DE交⊙ sketch template

如何证明圆内接四边形对角线之积等于对边的乘积和 知乎 sketch template

用两种方法证明“圆的内接四边形对角互补”．已知：如图�，四边形ABCD内接于⊙O．求证：∠B＋∠D＝180°．证法1：如图�，作直径DE交⊙ sketch template

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