In a triangle ABC, a= 4, b = 3,∠A=60°. Then, c is the root of the equation View Solution Doubtnut is No.1 Study App and Learning App with Instant Video Solutions for NCERT Class 6, Class 7, Class 8, Class 9, Class 10, Class 11 and Class 12, IIT JEE prep, NEET preparati...
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百度试题 结果1 题目In a triangle ABC if a=13 cm, b=21 cm, C=58^(° ) then the value of c is 相关知识点: 试题来源: 解析 c=√(320.67)=17.90 cm 反馈 收藏
百度试题 题目Given BC=1,in a triangle(三角形)ABC, then the range of length of the side AB (or AC) is___。 相关知识点: 试题来源: 解析 略 反馈 收藏
( )2.In the triangle ABC,AC is parallel to(平行于)DE,DF is parallel to GH.Whichof the following statements is true? A.Angle(角)BHG is smaller than angle BFD. B.Angle BGH is equal to(相等)angle BDF. C.Angle BAC is larger than angle BDE. D.Angle DEB is larger than angle ACB....
Using the cosine rule in △ABD and △ABC: cos 0= 2() 2ac ac 2ac ∴2(c^2+(a^2)/4-m^2)=a^2+c^2-b^2 ∴2c^2+(a^2)/2-2m^2=a^2+c^2-b^2 ∴4c^2+a^2-4m^2=2a^2+2c^2-2b^2 ∴4m^2=2c^2+2b^2-a^2 ∴m^2=1/4(2c^2+2b^2-a^2) If r=b=c...
解析 三角形BDE,三角形EDC,三角形AEC;三角形ADC,三角形BEC. 由BD=DC,且AE=ED,有{{S}_{\triangle ABE}}={{S}_{\triangle BDE}}={{S}_{\triangle EDC}}={{S}_{\triangle AEC}},从而有{{S}_{\triangle ABD}}={{S}_{\triangle ADC}}={{S}_{\triangle BEC}}....
In triangle ABC, side AB is perpendicular to side BC. If angle CAB is greater than 45 degrees, then which of the following could be the value of angle ACB? A75° B65° C55° D45° E35° 显示答案 登录后才可以添加做题笔记哦,还没有账号? 马上注册 KMF 解析 网友解析 题目数据 ...
结果1 题目 In \triangle ABC, D is a point on side \overrightarrow{AC} such that BD=DC and \angle BC D measures 70{}^\circ . What is the degree measure of \angle ADB?( )∠A A. 100 B. 120 C. 135 D. 140 E. 150 相关知识点: 试题来源: 解析 D略. 反馈 收藏 ...
Given BC=1,in a triangle(三角形)ABC, then the range of length of the side AB (or AC) is___。 试题答案 在线课程 解析 练习册系列答案 剑指中考系列答案 名师点睛教材详解系列答案 课堂精练解读与指导系列答案 初中语文阅读专题训练系列答案