Which geometric term is modeled by the stop sign

Factor the expression using the gcf. the expression 21m−49n factored using the gcf

Calculate the missing value. round the answer to on decimal place. start with 70, increase it by 21%, and end up with

Asquare and an equilateral triangle have the same perimeter. each side the triangle is 4 inches longer than each side of the square. what is the perimeter of the square