John walks four kilometers east, two kilometers north as shown in the diagram below. What is John’s displacement 4 km

11 km

2 km north

7 km east

i think it because equal matrices have equal dimensions, only square matrices can be symmetric. for all indices and . every square diagonal matrix is symmetric, since all off-diagonal elements are zero. in linear algebra, a real symmetric matrix represents a self-adjoint operator over a real inner product space.

because growing process had stoped after 4-5 year