Question

一個(gè)正方形最多可以畫(huà)(   )條對(duì)稱(chēng)軸．

1. A.
   1
2. B.
   4
3. C.
   2

Answer 1

B
分析：根據(jù)對(duì)稱(chēng)軸的定義，對(duì)稱(chēng)圖形中對(duì)折能使圖形兩部分重合的線(xiàn)就是對(duì)稱(chēng)軸；正方形的特點(diǎn)是對(duì)角相等，對(duì)邊相等，4個(gè)角都是直角，所以沿對(duì)邊對(duì)折，有2條對(duì)稱(chēng)軸，沿對(duì)角對(duì)折有2條對(duì)稱(chēng)軸，共4條對(duì)稱(chēng)軸；據(jù)此選擇．
解答：正方形沿對(duì)邊對(duì)折，有2條對(duì)稱(chēng)軸，沿對(duì)角對(duì)折有2條對(duì)稱(chēng)軸，共4條對(duì)稱(chēng)軸；
故選：B．
點(diǎn)評(píng)：此題考查了對(duì)稱(chēng)軸的找法，一般是根據(jù)軸對(duì)稱(chēng)圖形的定義和圖形的特點(diǎn)，沿一條直線(xiàn)對(duì)折兩部分完全重合，這條直線(xiàn)就是其對(duì)稱(chēng)軸．