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浙教版八年级下册数学5.1矩形(2)作业本2答案

A.1矩形(2)作业本2答案

【参考答案】

基础练习
1、不唯一,
如∠ABC = 90°
2、D
3、由 OM ⊥ BC,BM = CM,
得 OB = OC,从而 BD = AC.
根据 “ 对角线相等的平行四边形是矩形 ”......

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单项选择题M:Hello.W:Hello,Sam.This is Paula Handson.Sorry to bother you.But I’m having a small problem I thought you might be able to help me with.M:Sure,Paula.What’s up?W:Well,you know Sarah and I moved into an off-campus apartment in the fall?Anyway we’ve been happy with it until the past couple of months.M:Yeah.What happened?W:Well,the dishwasher broke down.So we reported it to Ms.Connors,the owner.She said she’d take care of it.But a month went by and nothing happened.M:Did you get back in touch with her?W:I got a repairperson to give me an estimate,and then I sent it to her.When I didn’t hear from her,I had the repair done.And I deducted the cost from the rent check.M:So what’s the problem?W:She called here mad as a hornet.She said she could have gotten the repair done for less money.Now she’s threatening to evict us for not paying the full rent.Well,you are over at the law school.So I wondered if you would mind coming with Sarah and me when we go to talk to Ms.Connors.We’re supposed to meet with her tomorrow night at eight.M:Sure.I haven’t studied a lot about contracts yet.But I’d be glad to help you straighten things out.Why don’t I stop by at about 7:30?W:Thanks,Sam.You’re a lifesaver.Why is Paula unhappy?()

A.The apartment is too far from the campus.
B.The apartment needs a lot of repair work.
C.She's having trouble with the owner of the apartment.
D.Her roommate won't share expenses.