In a triangle ABC, angle A = 60 degrees, angle B = 70 degrees. What is the measure of angle C? A. 50 degrees B. 60 degrees C. 70 degrees D. 80 degrees 相关知识点: 试题来源: 解析 A。三角形内角和是 180 度,已知角 A 和角 B 的度数,那么角 C 的度数为 180 - 60 - 70 =...
Example 2: In triangle ABC, angle BAC = 60°, and BC = AB. What is the measure of angle BCA? 相关知识点: 试题来源: 解析 解析: 根据题目中给出的信息,我们需要求解角BCA的度数。 根据三角形内角和定理,三角形ABC的三个内角之和等于180度,即角BAC + 角ABC + 角BCA = 180°。 已知角BAC...
4. In triangle ABC the bisector of angle BCA intersects the circumcircle again at R, the per-pendicular bisector of BC at P, and the perpendicular bisector of AC at Q. The midpoint of BC is K and the midpoint of AC is L. Prove that the triangles RPK and RQL have the same area....
Step by step video, text & image solution for In a triagnle ABC, angle B=pi/3 " and " angle C = pi/4 let D divide BC internally in the ratio 1:3 .Then (sin (angle BAD))/((Sin (angle CAD)) is equal to by Maths experts to help you in doubts & scoring excellent marks in...
In triangle ABC, the magnitude of the internal angle gamma is equal to one-third of the angle alpha. The size of the angle beta is 80 degrees larger than the size of the gamma angle. Calculate the magnitudes of the interior angles of the triangle ABC. 相关知识点: 试题来源: 解析 ...
In a triangle ABC , let∠C=π2. If r is the in-radius and R is the circum-radius of the triangle , then 2 (r + R) is equal to View Solution The vertices of triangle ABC are A (4, 4), B (6, 3), C (2, -1), then angle ABC is equal to ...
In a triangle ABC the angle C is three times the size of angle A, the angle B is twice the size of angle A. Then the triangle ABC A. is equilateral B. is isosceles C. has an obtuse angle D. has a right-angle E. has only acute angles 相关知识点: ...
Triangle ABC lies in the first quadrant. Points A, B,and C are reflected across the line y=x to points A′, B′, and C′, respectively. Assume that none of the vertices of the triangle lie on the line y=x. Which of the following statements is not always true?( ) A. Tiangle ...
In Triangle ABC, ∠A is 10 degrees greater than ∠B, and ∠B is 10 degrees greater than ∠C. The value of angle B is _出国考试答疑器_GMAT_试题_Problem Solving
In triangle ABC, side AB has length 8 cm, side BC has length 7 cm and side AC has length 6 cm.Find the size of angle ABC. 相关知识点: 试题来源: 解析 46.6° cos A = (b^2+c^2-a^2)(2bc)cos x = ((7)^2+(8)^2-(6)^2)(2(7)(8))cos x = (11)(16)x = cos^-...