Math · Topic 93 of 124
Perimeter of Irregular Shapes
⭐ MasteredAn irregular shape has sides of different lengths. To find its perimeter, add the lengths of all the sides, including any that are not labelled, by working them out first.
💡 Fun fact
A regular octagon has eight equal sides, but an irregular octagon can have sides of many different lengths.
All about Perimeter of Irregular Shapes
An irregular shape has sides of different lengths. To find its perimeter, add the lengths of all the sides together. Some sides may not be labelled, so work out their lengths from the other measurements first.
Checking that you have included every side helps you avoid mistakes.
🎮 Try it yourself!
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