Answer please with explanation thank you

Shape a has 1 order of rotational symmetry and 1 line of symmetry

Shape b has 2 orders of rotational symmetry and 0 line of symmetry

Rotational symmetry is how many times a shape can be rotated and look the same.

Lines of symmetry are how lines can be put through the shape to make it symmetrical or the same on both sides

step-by-step explanation:

we can use this expression to calculate the energy gain as a particle moves with a field or the energy loss as it moves against it. (note that it is also used to define the electron-volt, a unit of energy equal to that gained by an electron as it falls through a pd of 1 v, i.e. w = 1 ev = 1.6 10-19 c 1 v = 1.6 10-19j).in fact this expression is really nothing more than the statement that potential is the potential energy per unit charge. in this case, v= w/qis simply stating that the change in potential energy(or work done) per unit charge is equal to the change in potential (or potential difference), v.student questions: uniform electric fields2electron beamcathode+5 kvanode0 v