Arlene wants to create a scale drawing of the poster as in: 9 inches and 6 inches. what are the dimensions of the poster at one-third its current size?

If you divide each of the lengths by 3, thus giving you the one-third of the finishing size, you'll get 2 inches for the length and 3 inches for the width. If dimensions is perimeter, you get 2+2+3+3=10 10 inches=Perimeter. You could also add up the sides and divide them by 3. 6+6+9+9=30 30/3=10 inches