题目

如图,在△ABC中,AB=AC,AD⊥BC,点P是AD上的一点,且PE⊥AB,PF⊥AC,垂足分别为点E、F,求证:PE=PF. 答案:【答案】证明见解析【解析】试题分析:在三角形ABC中,根据等腰三角形的三线合一的性质,可得∠BAD=∠CAD,又由角平分线的性质,即可证得PE=PF.试题解析:证明:在三角形ABC中,∵AB=AC,AD⊥BC于D,∴∠BAD=∠CAD,即∠EAP=∠FAP,∵PE⊥AB,PF⊥AC,∴PE=PF.---I can’t ____my addiction to computer games. ---Come on! Computer games are ____. We play games on the iphone now.A.get caught in; on the way outB.get rid of; on the way outC.be caught in; running outD.run out of; getting rid of
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