How to find the value of x in a triangle?
An unknown angle in a triangle is found using the angle properties of a triangle.
Answer: The value of x in a triangle is 120°
Let us understand the concept through an example.
The given triangle is an equilateral triangle.
Hence, all angles are equal to 60°.
Now, for a triangle we know that
Interior angle + adjacent exterior angle = 180°
60° + x = 180°
x = 180° – 60° = 120°.