Which statement about tsunamis are true? (more than one answer) a. they are powerful ocean waves
b. they are less destructive than typical wind-caused waves
c. earthquakes can stop them from causing flooding
d. underwater landslides can cause them
e. coastal areas are safe from them

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.