Question

One of the angles of a triangle is equal to the sum of the other two angles if the ratio of other two angle is 2: 7 find all the angles oftriangle

Answer 1

one angle = 2x , second angle = 7x , third angle = 2x+7x = 9x

now 2x + 7x + 9x = 18x = 180

x = 10

angles are 20, 70 and 90.