Perimeter — How to do it

Length (l)

8 units

Width (w)

5 units

Step 1 — Write the shortcutPerimeter = 2 × (length + width)

Step 2 — Add the two different sideslength + width = 8 + 5 = 13

Step 3 — Double itPerimeter = 2 × 13 = 26 units

Your turn — what's the perimeter? units

A rectangle has two lengths (the brass edges) and two widths (the mustard edges). So instead of adding four numbers, add one length and one width, then double it: Perimeter = 2 × (l + w).