Forming expressions for area and perimeter and simplifying to show equivalence. There is a great deal of scope for differentiation here, with two activities which take the idea further (The last one is not my own, but from a resource called 'Materials to Support able mathematicians in KS3&') Includes application of trigonometry ratios in finding the general rule for areas of regular polygons.


  • LP 10A1a 19102010 - equivalent expressions.doc
  • Equivalent Shape Expressions - Answers and Handouts.doc
  • Equivalent Shape Expressions.flipchart
  • Equivalent Shape Expressions.pdf
  • Shape Posters.doc

Report a problem

This resource is designed for UK teachers. View US version .

4 Reviews

  • 4
    user avatarpmw19743 years agoreport

    This is great thanks! As a slight niggle for shape 5 e must be 3 as 4+2e =10, then stating that the area is 24 is confusing, I changed the question to "can you find the area?". Thankyou for sharing.

  • 5
    user avatarcejs5 years agoreport

    Great resource, thank you for sharing.

  • 5
    user avatargilturner5 years agoreport

    I adapted this lesson for able year 7s. It was excellent. Than you.

  • 5
    user avatardwatson8026 years agoreport

    A brilliant resource, a great thinking skills lesson! I love it!