InterviewSolution
Saved Bookmarks
| 1. |
In an isosceles triangle, if the vertex angle is twice the sum of the base angles, then the measure of vertex angle of the triangle isA. 100°B. 120°C. 110°D. 130° |
|
Answer» Let the base angles be x each, Vertex angle = 2(x + x) = 4x Now, since the sum of all the angles of a triangle is 180° x + x + 4x = 180° 6x = 180° x = 30° Therefore, vertex angle= 4x = 120° |
|