Answer:
x = 20
Explanation:
All of Triangle ABC’s sides are equivalent to 1. This means that Triangle ABC must be an equilateral triangle.
The inner angles of any triangle will always add up to 180. The equilateral triangle is special in that all of its sides are the same, and so are its angles. The three angles of an equilateral triangle are all 60 degrees, because that’s a third of 180.
Because of that, 3x must equal 60 degrees.
3x = 60
Then, we just have to divide both sides by 3 to isolate the x:
3x/3 = 60/3
x = 20
Hope this helps!