求证af➕cf等于ab
来源:蜘蛛抓取(WebSpider)
时间:2018-10-02 14:13
标签:
ab是af的几分之几
如图已知平行四边形CD,过A作AM⊥BC於M交BD于E,过C作CN⊥AD于N交BD于F,连结AF、CE.
(1)求证:四边形AECF为平行四边形;
(2)当AECF为菱形M点为BC的中点时,求:AE的值.
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如图为⊙O的直径,CD⊥垂足为D,
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(2)若⊙O的半径为5AE=8,求EF的长.
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已知:如图在△C中,=AC点D是BC的Φ点,作∠E=∠BADAE边交CB的延长线于点E,延长AD到点F使AF=AE,连结CF.