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 = 60°,并...
<p>To solve the problem, we will follow these steps:</p><p><strong>Step 1: Determine the measure of angle A</strong> Given: - Angle B = 72° - Angle C = 44°</p><p>To find angle A, we use the property that the sum of angles in a triangle is 180°.</p><p>
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....
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 =...
In triangle ABC, angleA=pi/3 and b:c =2:3, tan theta=sqrt3/5, 0 lt the... 02:46 In a DeltaABC, AD is the altitude from A. Given bgtc ,angleC=23^(@) an... 04:31 If the angles A, B, C (in that order) of triangle ABC are in arithmeti... 03:37 If the radius...
In triangle ABC, the angle ACB is greater than a right angle. Let D be the foot of the perpendicular from C to AB,let M be the midpoint of AB,let E be the point on AC(extended)such that EM=BM,and let F be ...
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^-...
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: ...
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 ...
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 ...