Question

If the length of one side of a triangle
Is 2x - 1 units and the perimeter is 18

What is x?

The equation isn't placed anywhere
On the triangle and the triangle is just
A regular one. It is not obtuse or acute

Answer 1

All triangles have some combination of right, acute, or obtuse angles.

Study this site and decide which kind of triangle this is.

http://www.mathsisfun.com/triangle.html

Answer 2

im assuming youre talking about an equilateral triangle.

the perimeter is A+b+C=18

and one side is 2x-1 so

so 2x-1+2x-1+2x-1=18

combine like terms

6x-3=18

so 21/6=x

x=3.5