下列四个命题:
①半圆(或直径)所对的圆周角是直角;②圆既是轴对称图形,又是中心对称图形;③相等的圆心角所对的弧相等;④平分弦的直径垂直于弦.其中正确命题的个数为( )
①半圆(或直径)所对的圆周角是直角;②圆既是轴对称图形,又是中心对称图形;③相等的圆心角所对的弧相等;④平分弦的直径垂直于弦.其中正确命题的个数为( )
A.1 | B.2 | C.3 | D.4 |
更新时间:2023-11-09 18:32:43
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【推荐1】下列语句中,正确的是( )
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