Have a play around with this task, and please share any questions, extensions, simplifications, modifications, or lines of inquiry in the comment box below. The idea is to collect loads of suggestions that can then be used for effective differentiation. The full set of these tasks, along with additional notes, can be found here: http://www.mrbartonmaths.com/richtasks.htm


  • 10.-How-many-angles-(TES).pptx
  • Nine-Pin-Circle-Handout.doc

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2 Reviews

  • 5Recommended
    user avatart0md3an2 years agoreport

    A fantastic rich activity! Just what I am looking for to try out with some of my classes! Thanks for sharing :-)

  • 5Recommended
    user avatarTES_Maths3 years agoreport

    Convince me you know the size of each angle

    Which angles can you make in more than one way?

    Convince me there are some angles you cannot make

    Which angles can you make at a point and which at the intersection of two lines?

    Which angles need you to use the centre point?

    Which circle theorems can you demonstrate using this task?

    How many different triangles can you make on this board, and how do you know they are different?

    Try this task on an 8-pin or a 12-pin geoboard