Question

write the types of the triangle whose one angle is 120​

Answer 1

Here, the triangle ABC is an obtuse triangle, as ∠A measures more than 90 degrees. Since, ∠A is 120 degrees, the sum of ∠B and ∠C will be less than 90° degrees. Since ∠A = 120°, therefore, ∠B + ∠C= 60°. Hence, if one angle of the triangle is obtuse, then the other two angles with always be acute.

hope it helps.

Answer 2

Answer:

The following are the types of triangle whose one angle is 120°:-

1) Obtuse angled triangle

2) Isosceles triangle ( If the base angles are same)