These resources for calculating a rectangle's perimeter will help fourth and fifth graders improve their geometry and math skills. There is review of the formula for a rectangle’s perimeter, 2(l+w), and an introduction to the formula for area, w x l. Worksheets teach the formula for the perimeter and area of rectangles
for students who are not familiar with them. Activities also help students understand relationships between rectangles that have the same distance around them. By measuring and drawing the 2-D shape, students will learn how to calculate a rectangle's perimeter. A hands-on activity with blocks also helps students better understand perimeter. Once students learn the formula for a rectangle’s perimeter they can try more difficult exercises, such as determining the lengths of a rectangle’s sides when only given the measurement of one side and the perimeter.