This document provides examples of calculating the perimeters of rectangles and missing lengths. It explains that to find the perimeter of a rectangle, you add up the lengths of all the sides by doubling the length and width and adding them together. Examples are provided of calculating perimeters when given only the length and width. The document also asks how to find missing lengths when only some side lengths are provided.
![Pitch Perimeters ,[object Object]](https://image.slidesharecdn.com/pitchperimeters-111116154828-phpapp02/85/Pitch-perimeters-1-320.jpg)
![What do we mean by the perimeter of a shape? ,[object Object],[object Object],[object Object],Answer = 30cm](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)