If one side of a square notebook measures 20 cm, what is the area of the front cover of the notebook?

Salutations!

We know tat square has equal sides, so we will just multiply 20 twice as in [tex]S*S[/tex] or [tex]S^2[/tex]. Both of them are equal.

Area of the front cover of the notebook = [tex]s^2[/tex]

                                                              = [tex]20*20[/tex]

                                                               = [tex]400cm^2[/tex]

Hope I helped (:

have a great day!