Is the triangle an equilateral triangle The triangle (options is or is not) an equilateral triangle
Justify your answer

Step-by-step explanation:

Set two side lengths equal to one another

Solve for x

Let x = 4 in the first side length

Let x = 4 in the third side length

Both side lengths are unequal so the triangle is not an equilateral triangle.

3x + 18 = 147°

step-by-step explanation:

3x + 18 = 147°, because the value of the central angle is equal to the value of the arc formed by it.

i hope i you.