Fill in the Blanks Youtube Area & Perimeter QuizOnline version While watching the video, "Finding AREA & PERIMETER of a Rectangle Examples," try your best to fill in the blanks using the information you learned from the video! by Elizabeth Mason 1 square rectangle L W length sum area units When finding the perimeter of a , one must measure the of all four sides . The expression to show perimeter is P = the of all sides . The of a rectangle is all of the space covering the inside . Area is always measured in . The expression to show area is A = x .