Answer:
3 and 1/2
Step-by-step explanation:
0 lines because however you cut it in half, The sides do not match.
I'm not to clear on what this triangle is trying to say but if 18 is a side and 12 is a side let's use the Pythagorean theorem to solve for the other side
18²=a²+12²
324=a²+144
180=a²
√180 = a
13.41 =a
since x look about twice a
x=2*13.41
x=26.8
