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华东师大版《数学》(以下简称华师版)九年级(下)第37页“垂径定理”的推论是这样的:“平分弦的直径垂直于这条弦,并且平分弦所对的弧”.北师大版《数学》(以下简称北师版)九年级(下)第
East China Normal University version of “Mathematics” (hereinafter referred to as the Chinese version) ninth grade (below) p. 37 “Diameter theorem” is inference: “bisects the diameter of the string perpendicular to the string and bisects the string On the arc ”Beijing Normal University Edition“ Mathematics ”(hereinafter referred to as the North division version) ninth grade (below)