If two angles of a triangle are 30∘120∘ then the triang
| If two angles of a triangle are 30∘,120∘, then the triangle will be
A. Right angle triangle
B. Scalene triangle
C. Equilateral triangle
D. Isosceles triangle
Please scroll down to see the correct answer and solution guide.
Right Answer is: D
SOLUTION
Let the third angle be 'x'
30∘+120∘+x=180⇒x=180∘−150∘⇒x=30∘
Here, two angles are equal then it is an isosceles triangle.