# using symmetry in the siffness method

Good day All while trying to solve this exercice

I tried to find a symmetry plan to make my computations easy

and according to my basic understanding the symmetry must be in term of: lenght

• length
• support

so my question is can I consider the red line of this picture as an axe of symmetry? many thanks in advance!

You can't , because the bound at $1$ is not symmetric to that line.