The diagram shows an isosceles triangle.
All the measurements are in cm.
3x - 5
19 - x
2x

Answer:
4x+14, or 2(2x+7)
Explanation:
perimeter is the distance round an object
add; 3x-5+19-x+2x
4x-5+19
4x+14 or 2(2x+7)