Question

圓有無(wú)數(shù)條對(duì)稱軸，圓的直徑是圓的對(duì)稱軸．

×

．（判斷對(duì)錯(cuò)）

Answer 1

分析：對(duì)稱軸是直線，但是直徑是一條線段，只能說(shuō)圓有無(wú)數(shù)條對(duì)稱軸，每條對(duì)稱軸都經(jīng)過(guò)直徑，或說(shuō)圓關(guān)于直徑對(duì)稱．而不能說(shuō)每一條對(duì)稱軸都是直徑．

解答：解：對(duì)稱軸是直線，但是直徑是一條線段，只能說(shuō)圓有無(wú)數(shù)條對(duì)稱軸，每條對(duì)稱軸都經(jīng)過(guò)直徑，或說(shuō)圓關(guān)于直徑對(duì)稱．而不能說(shuō)每一條對(duì)稱軸都是直徑．
故答案為：×．

點(diǎn)評(píng)：此題主要考查軸對(duì)稱圖形的概念及對(duì)稱軸的條數(shù)．