They are similar because they both have a similar need for electrons. An ionic bond is a bond between a metal and a nonmetal and a covalent bond is a bond between two nonmetals.
First add the perimeter 3.65m + 2.24m + 2.24m + 3.65m + 2.57m = 14.35 m then convert meters to centimeters (just move the decimal place two places to the right) answer is 1,435 cm