如圖.若將△ABC的繞點(diǎn)C順時(shí)針旋轉(zhuǎn)90°后得到.則A點(diǎn)的對(duì)應(yīng)點(diǎn)的坐標(biāo)是A.B.(2,2)C.(3,0)D.(2,1) 查看更多

 

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18、如圖,若將△ABC的繞點(diǎn)C順時(shí)針旋轉(zhuǎn)90°后得到△DEC,則A點(diǎn)的對(duì)應(yīng)點(diǎn)D的坐標(biāo)是(  )

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21、如圖,若將△ABC的繞點(diǎn)C順時(shí)針旋轉(zhuǎn)90°后得到△DEC,則A點(diǎn)的對(duì)應(yīng)點(diǎn)D的坐標(biāo)是
3,0
,B點(diǎn)的對(duì)應(yīng)點(diǎn)E的坐標(biāo)是
2,2
,請(qǐng)畫出旋轉(zhuǎn)后的△DEC.(不要求寫畫法)

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如圖,若將△ABC的繞點(diǎn)C順時(shí)針旋轉(zhuǎn)90°后得到△DEC,
(1)A點(diǎn)的對(duì)應(yīng)點(diǎn)D的坐標(biāo)是
(3,0)
(3,0)

     B點(diǎn)的對(duì)應(yīng)點(diǎn)E的坐標(biāo)是
(2,2)
(2,2)

(2)請(qǐng)畫出旋轉(zhuǎn)后的△DEC(不要求寫畫法)
(3)求出△ABC的面積.

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如圖,若將△ABC的繞點(diǎn)C順時(shí)針旋90°后得到△DEC,

則A點(diǎn)的對(duì)應(yīng)點(diǎn)D的坐標(biāo)是       ,

B點(diǎn)的對(duì)應(yīng)點(diǎn)E的坐標(biāo)是        ,

請(qǐng)畫出旋轉(zhuǎn)后的△DEC(不要求寫畫法)

 

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如圖,若將△ABC的繞點(diǎn)C順時(shí)針旋轉(zhuǎn) 90°后得到△DEC,則A點(diǎn)的對(duì)應(yīng)點(diǎn)D的坐標(biāo)是
,B點(diǎn)的對(duì)應(yīng)點(diǎn)E的坐標(biāo)是        ,請(qǐng)畫出旋轉(zhuǎn)后的△DEC(不要求寫畫法) .

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