如图，E、F是□ABCD的对角线AC上的两点，且AE=CF．试判断BE与DF的数量关系，并说明理由.

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如图，E、F是□ABCD的对角线AC上的两点，且AE=CF．试判断BE与DF 的数量关系，并说明理由.

上一题下一题 0.0难度选择题更新时间:2019-11-19 07:42:10

答案(点此获取答案解析）

解：BE=DF，理由：∵四边形ABCD是平行四边形，∴AB∥CD，AB=CD，∴∠BAE=∠DCF，在△ABE和△CDF中，

{\begin{matrix} A E = C F \\ ∠同类题1 Survey: What's your favorite restaurant? Lola Lopez Jim Janssen “I'm an actress. There's a small French restaurant near my apartment. It's my favorite. The service is great. The food is always cooked well and served beautifully. And the atmosphere is very romantic\dots” “I'm a high school student. I'm interested in fast food. Chicken, burgers, fish, French fries — I love it all. My mom says I should eat healthier food but it tastes so good! Also, I'm not rich and the price of fast food is just right for me.” Gina Mangino Raul Sanchez “I'm a housewife. With three kids, I look for a place that has good food at a reasonable price. I look for a place that's comfortable for children and serves the food quickly. That’s why I like Sam's Chinese restaurant.” “I'm a doctor. I can't remember the last time I ate out\dots maybe that's because my wife and I really like to cook. Instead of eating out, we look through a cookbook and cook at home.”同类题2 经对校园内马尾松的数月观察，小明同学作出下列小结，正确的是（    ）同类题3 下列说法正确的是（　　）同类题4 如图，在Rt△ABC中，∠ACB=90°，D为AB的中点，AE∥CD，CE∥AB，连接DE交AC于点O．同类题5 肺炎双球菌的遗传物质是 A小学学科试题库 小学语文 小学数学 小学英语 小学科学 小学道德与法治初中学科试题库 初中数学 初中语文 初中英语 初中物理 初中化学 初中生物 初中政治 初中历史 初中地理 初中历史与社会 初中科学 初中信息技术 高中学科试题库 高中语文 高中数学 高中英语 高中物理 高中化学 高中生物 高中政治 高中历史 高中地理 高中信息技术刷题宝 没有分数是刷题提高不了的！ 粤ICP备12066032号 本站仅为免费收集试题提供给学生刷题，不做任何盈利性活动！如无意侵犯您的合法权益，联系站长删除处理（QQ:2572127418）var _hmt = _hmt || [];
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Survey: What's your favorite restaurant?
Lola Lopez	Jim Janssen
“I'm an actress. There's a small French restaurant near my apartment. It's my favorite. The service is great. The food is always cooked well and served beautifully. And the atmosphere is very romantic…”	“I'm a high school student. I'm interested in fast food. Chicken, burgers, fish, French fries — I love it all. My mom says I should eat healthier food but it tastes so good! Also, I'm not rich and the price of fast food is just right for me.”
Gina Mangino	Raul Sanchez
“I'm a housewife. With three kids, I look for a place that has good food at a reasonable price. I look for a place that's comfortable for children and serves the food quickly. That’s why I like Sam's Chinese restaurant.”	“I'm a doctor. I can't remember the last time I ate out… maybe that's because my wife and I really like to cook. Instead of eating out, we look through a cookbook and cook at home.”