如图，在△ABC中，∠C=90°，AD是角平分线，且∠BAC=60°，AD=10，求AB的值．-数学

更多内容推荐

• 阅读理解。阅读下面的短文，并根据文章后的题目要求回答1-5小题。 (1)While adults need to eat breakfast each day to perform their be
• 全等三角形的______和______相等；两个三角形全等的判定方法有（填字母）：______；另外两个直角三角形全等的判定方法还可以用：（填字母）______．-数学
• 在△ABC中，BC：AC：AB=1：1：2，则△ABC是（）A．等腰三角形B．钝角三角形C．直角三角形D．等腰直角三角形-数学
• 如图，点D、E是等腰Rt△ABC的斜边BC上两个点（不含端点B、C），且∠DAE=45°，则图中与△EAD相似的三角形为______．-数学
• 阅读理解。 Who hasn't found themselves reaching for the closest food available when they're tir
• 阅读理解。 Everyone who has eaten instant noodles (方便面) before knows how it looks like. It is very easy t
• 如图，在△ABC中，∠ACB=90°，∠ABC=28°，CD⊥AB于D，则∠ACD=______度．-数学
• 如图，△ABC中，AD⊥BC于D，BE⊥AC于E，AD与BE相交于F，若BF=AC，则∠ABC的大小是（）A．40°B．45°C．50°D．60°-数学
• 进入青春期后，有的同学愿意与异性接近，甚至产生朦胧的依恋。对此现象你如何评价？[]A．不正常，是一种畸形心理意识B．没有把精力放在学习上，属不务正业C．下流，是一种特别丢-七年级生物
• 等腰直角三角形的腰长为，该三角形的重心到斜边的距离为[]A．B．C．D．-九年级数学
• 阅读理解。 In the US and Britain, the slogan around colleges was "Save water. Shower with a friend.&
• 阅读理解。 Would you eat a ready meal from the fridge rather than cook from scratch? Have you been doing
• 阅读理解。 In today's world, almost everyone knows that air pollution and water pollution are harmfu
• 不能判断两个直角三角形全等的条件是（）A．两锐角对应相等的两个直角三角形B．一锐角和斜边对应相等的两个直角三角形C．两条直角边对应相等的两个直角三角形D．一条直角边和斜边对-数学
• 正上初一的小明最近感觉到自己的声音明显变“粗”了，最合理的解释是[]A．进入青春期后正常的变声B．因疾病引起了声带发炎C．因咽喉发炎导致的发生困难D．因气候干燥，呼吸不畅-七年级生物
• 进入青春期后，身体变化上出现的显著特点是[]A．身高突增B．心肺功能加强C．体重增加D．神经系统功能明显加强-七年级生物
• 你对青春期的感受是什么？-七年级生物
• 下列各项中，不利于青春期发育的生活习惯是[]A．生活有规律B．加强体育锻炼C．只吃自己喜欢的食物D．注意个人卫生-七年级生物
• 阅读理解。 I'm a skeptic (怀疑论者) when it comes to the benefits of taking vitamins and other supplemen
• 小明将一张正方形包装纸，剪成图1所示形状，用它包在一个棱长为10的正方体的表面（不考虑接缝），如图2所示．小明所用正方形包装纸的边长至少为（）A．40B．30+22C．202D．10+102-数学
• 阅读理解。 Yoga (瑜伽) is the most popular and fast growing exercise trend of all. Yoga has a greater posit
• 如图所示，AB⊥BC，DC⊥BC，E是BC上一点，∠BAE=∠DEC=60°，AB=3，CE=4，则AD等于（）A．10B．12C．24D．48-数学
• △ABC中，AB=AC，∠BAC=90°，D为BC中点，DE⊥DF，若BE=12，CF=5，求EF的长．-数学
• 完形填空。 Is the world really going mad?1 day I was sitting in a restaurant2 a quick drink and a talk wi
• 阅读理解。 Jeremy Wirick, 9, has been back in school for less than two months, but he has already had sev
• 阅读理解。 请认真阅读下列短文，并根据所读内容在文章后表格中的空格里填入最恰当的单词。注意：每空格1个单词。 Do you raise salmon (鲑鱼) in your classroom a
• 阅读理解。 A snow leopard roars in the high mountains of Asia. A black rhinoceros gallops across the plai
• 阅读理解。 A new weapon is on the way in the fight against smoking in Europe. Soon when smokers buy cigar
• 阅读理解。 The Japanese government has launched a campaign encouraging people to go to bed and get up ext
• 阅读理解。 We have met the enemy and he is ours. We bought him at a pet shop. When monkey-pox, a disease
• 任务型阅读。阅读下面短文，根据所读内容在表格中的空白处填入恰当的单词。注意：每个空格只填一个单词。 Forgetting little things happens every day, but i
• 一位园艺设计师计划在一块形状为直角三角形且有一个内角为60°的绿化带上种植四种不同的花卉，要求种植的四种花卉分别组成面积相等，形状完全相同的几何图形图案．某同学为此提-七年级数学
• 如图，△ABC是等腰直角三角形，BC是斜边，将△ABP绕点A逆时针旋转后能与△ACP1重合．若AP=3，则PP1的长是______．-数学
• 阅读理解。 Directions: Read the following passage. Answer the questions according to the information give
• 阅读理解。 There is a lake near a forest in Sweden. The water in the lake is very clear and everything is
• 阅读理解。 Restaurant owners should not use disposable chopsticks for the good of their health and the en
• 阅读理解。 Have you ever been frustrated (沮丧的) when left talking to yourself after your mobile phone batt
• 阅读理解。 Car sharing is another way to drive green that's gaining in popularity, especially in urb
• 阅读理解。 At first sight, you would think the collection of hundreds of colored shards (碎片) could be a w
• Reading comprehension. In meditation (冥想), people sit quietly and focus their attention on their bre
• 如图，△ABC中，∠ACB=90°，CD⊥AB于D，若∠A=30°，则∠1=（）度，∠2=（）度，∠B=（）度．-七年级数学
• 下列条件中，不能判定两个直角三角形全等的是（）A．两条直角边对应相等B．斜边和一锐角对应相等C．斜边和一条直角边对应相等D．面积相等-数学
• △ABC中，AD是高，∠B=45°，∠C=30°，AD=2，则△ABC的面积为______．-数学
• 下面关于两个直角三角形全等的判定，不正确的是（）A．斜边和一锐角对应相等的两个直角三角形全等B．两条直角边对应相等的两个直角三角形全等C．斜边和一条直角边对应相等的两个直-数学
• 根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中的两项为多余选项。 Nobody has ever succeeded in their attempt to stay young
• 阅读理解。 The human body is a living machine, and, like all machines, it needs "fuel" (燃料) to
• 信息匹配。Autumn blues?Let the sunshine in.Falling leaves, withering flowers, cold winds, faint sunshine.
• 阅读理解。 If you're a male and you're reading this, congratulations! You're a survivor. A
• 阅读短文，根据短文内容判断正误，正确的填A，错误的填B。 American doctors say that mothers who smoke before their babies are bor
• 阅读理解。 Many people turn to the web for health advice. Women use the Internet to look for health infor