To calculate perimeters of 2D shapes in cm and mm

In this lesson, we will investigate different 2D shapes and calculate their perimeters in cm and mm, including regular shapes without all measurements provided, and irregular shapes.

Video

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Worksheet

These slides will take you through some tasks for the lesson. If you need to re-play the video, click the ‘Resume Video’ icon. If you are asked to add answers to the slides, first download or print out the worksheet. Once you have finished all the tasks, click ‘Next’ below.

Lesson summary: To calculate perimeters of 2D shapes in cm and mm

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