优课网
首页
数学
语文
英语
化学
物理
政治
历史
生物
首页
> 直角三角形的两锐角平分线所交成的角的度数是[]A.45°B.135°C.45°或135°D.以上答案均不对-八年级数学
直角三角形的两锐角平分线所交成的角的度数是[]A.45°B.135°C.45°或135°D.以上答案均不对-八年级数学
题目简介
直角三角形的两锐角平分线所交成的角的度数是[]A.45°B.135°C.45°或135°D.以上答案均不对-八年级数学
题目详情
直
角三角形的两锐角平分线所交成的角的度数是
[ ]
A.45°
B.135°
C.45°或135°
D.以上答案均不对
题型:单选题
难度:中档
来源:同步题
答案
C
上一篇 :
阅读理解。 It is reported th
下一篇 :
阅读理解。 Being the boss mi
搜索答案
更多内容推荐
如图所示,在△ABC中,∠B=90°,AB=3,AC=5,将△ABC折叠,使点C与点A重合,折痕为DE,则△ABE的周长为()。-七年级数学
阅读理解。 The hole in the Earth's ozone layer (臭氧层) has until now protected Antarctica from the wor
阅读理解。 How could we possibly think that keeping animals in cages in unnatural environments-mostly for
阅读理解。 How can you find out what is going on inside a person's body without opening the patient
仔细阅读下面短文并按照语境完成填空 (每空只能填一个单词),注意语法,词性、词形变化等。Dear Dr Health,I think too many people take weight-loss
阅读理解。 A quarrel at home may result in you falling ill. Don't laugh, it's true. Family matt
阅读理解。 Skeptics are strange lot. Some of them refuse to admit the serious threat of human activities
如图,在△ABC中,∠ACB=90°,CD⊥AB于D,∠B=35°,求∠A、∠ACD的度数。-七年级数学
阅读理解。 Trees are useful to man in three very important ways: they provide him with wood and other pro
直角三角形斜边上的中线等于()。-八年级数学
已知BD,CE是△ABC的两条高,M、N分别为BC、DE的中点,勇敢猜一猜:(1)线段EM与DM的大小有什么关系?EM()DM;(2)线段MN与DE的位置有什么关系?-八年级数学
在△ABC中,CD是边AB上的中线,若CD=AB,则△ABC是[]A.锐角三角形B.钝角三角形C.直角三角形D.不能确定-八年级数学
阅读理解。 Most rain forest lie close to equator (赤道), where the climate is often mild and there are long
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或词组(每个空格填词最多不超过三个单词)。 You are what you eat so maybe it's t
阅读理解。 Good nutrition and a balanced diet will help your children grow up healthily. No matter how ol
完形填空。 Here's a new warning from health experts: Sitting is deadly. Scientists are increasingly
阅读理解。 Across the world, 1.1 billion people have no access to clean drinking water. More than 2.5 bil
阅读理解。 Hi, dear boys and girls! Do you know how to be a healthy kid? Here are some rules you should f
Reading Comprehension. L1PITOR ABOUT LIPITORLipitor is a prescription medicine. Along with diet and
阅读理解。 Is a recently discovered hormone the reason why folks who lose weight can't keep it off?L
阅读理解。 Getting rid of dirt, in the opinion of most people, is a good thing. However, there is nothing
如图,Rt△ABC中,∠C=90°,AD是角平分线,DE⊥AB于点E,下列结论中错误的是[]A.BD+DE=BCB.DE平分∠ADBC.AD平分∠EDCD.DE+AC>AD-八年级数学
如图,已知梯形ABCD中,AD∥BC,AD=3,AB=CD=4,BC=7,则∠B=()。-九年级数学
下列说法中错误的是[]A.三角形的中线、角平分线、高线都是线段;B.任意三角形的外角和都是360°C.有一个内角是直角的三角形是直角三角形;D.三角形的一个外角大于任何一个-七年级数学
如图所示,在四边形ABCD中,∠BDC=90°,AB⊥BC于B,E是BC的中点,连结AE,DE,则AE与DE的大小关系是[]A.AE=DEB.AE>DEC.AE<DED.不能确定-八年级数
阅读所给短文,并根据短文后题目的要求进行简答。(注意题后的字数要求) _____. Fifty years ago, only 4 out of every 100 people in the Un
阅读理解。 Boiler rooms are often dirty and steamy, but this one is el.ean and cool. Fox Point is a very
Directions: Complete the following passage by using the words in the box. Each word can only be used
阅读理解。Dear Expert:I was asked to retrieve my 14-year-old daughter from a five-day camping trip. She w
阅读理解。 Celia was shocked. She had always been in good shape during high school, but now, in her first
阅读理解。 Scientists are trying to make the deserts into good land again. They want to bring water to th
阅读理解。 Australia's Great Barrier Reef will lose most of its coral cover by 2050 and, at worst, t
阅读理解。 Science can't explain the power of pets, but many studies have shown that the company of
阅读理解。 Qiao is a sixth grader at Yuhui Primary School. He is only 12 years old but has been smoking f
在△ABC中,∠A=∠C=50°,△ABC内一点P,使∠PAC=∠PCA,则∠ABP=()。-七年级数学
Directions: Read the following passage. Answer the questions according to the in formation given in
如图,△ABC中,∠ACB=Rt∠,AB=,BC=,求斜边AB上的高CD。-八年级数学
若直角三角形的两条直角边长分别为6和8,则斜边上的中线长是[]A.3B.4C.5D.10-八年级数学
在△ABC中,∠C=90°,AB=2AC,AD为∠BAC的平分线,求证:D在AB的垂直平分线上。-八年级数学
(1)矩形的四个角都是(),矩形的对角线();(2)直角三角形斜边上的中线等于斜边的()。-八年级数学
如图,△ABC中,∠C=90°,AC=3,∠B=30°,点P是BC边上的动点,则AP长不可能是[]A.3.5B.4.2C.5.8D.7-八年级数学
阅读理解。 "High income is not as good as high age, and high age is not as good as high spirits.&quo
阅读理解。The food we eat seems to have a great effect on our health. Although science has made big steps
阅读下面短文并回答问题,然后将答案写到答题卡相应的位置上(请注意问题后的字数要求)。 [1]One out of many important things for the whole family
阅读理解。 Ask someone what they have done to help the environment recently and they will almost certainl
阅读理解。 Ask someone what they have done to help the environment recently and they will almost certainl
Directions: Complete the following passage by filling in each blank with ONLY ONE WORD that best fit
阅读理解。 Patients and doctors alike have long believed in the healing (治疗) power of humor. It is claime
阅读理解。 For almost two months, Dominic York, a 23-year-old hairdresser, wandered about hospitals at ni
如图,在△ABC中,AB=AC=8,AD是角平分线,E为AC中点,则DE=()。-八年级数学
返回顶部
题目简介
直角三角形的两锐角平分线所交成的角的度数是[]A.45°B.135°C.45°或135°D.以上答案均不对-八年级数学
题目详情
B.135°
C.45°或135°
D.以上答案均不对
答案