Question

one of the angles of a triangle is equal to the sum of the other two angles. if the ratio of the other two angles is 2:7 , find all the angles of the triangle.

Answer 1

Let the first angle be 2a
Second angle = 7a
third angle = 9a


2a + 7a +9a = 180
=> 18a = 180
=> a = 10

First angle = 20 degree
Second angle = 70 degree
Third angle = 90 degree