The answer is none of the lines intersect each other, because they are at the same slope, and they do not have a different slope for the lines to be intersected.
a-b-c
that's the answer the negative sign affects what's in the bracket
1)Add up the numbers and variables.
2) Triangles equal 180 degrees.
3)Subtract the total of the numbers and 180.
4) Then divide by the variable.
X= -10
