2D shapes and their properties

  • Opposite vertices
    problem
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    Opposite Vertices

    Age
    11 to 14
    Challenge level
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    Can you recreate squares and rhombuses if you are only given a side or a diagonal?

  • Efficient cutting
    problem
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    Efficient Cutting

    Age
    11 to 14
    Challenge level
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    Use a single sheet of A4 paper and make a cylinder having the greatest possible volume. The cylinder must be closed off by a circle at each end.

  • Square It
    problem
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    Square It

    Age
    11 to 16
    Challenge level
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    Players take it in turns to choose a dot on the grid. The winner is the first to have four dots that can be joined to form a square.

  • Parallelogram It
    problem
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    Parallelogram It

    Age
    11 to 16
    Challenge level
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    Players take it in turns to choose a dot on the grid. The winner is the first to have four dots that can be joined to form a parallelogram.

  • Rhombus It
    problem
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    Rhombus It

    Age
    11 to 16
    Challenge level
    filled star filled star empty star

    Players take it in turns to choose a dot on the grid. The winner is the first to have four dots that can be joined to form a rhombus.

  • problem
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    Salinon

    Age
    14 to 16
    Challenge level
    filled star empty star empty star

    This shape comprises four semi-circles. What is the relationship between the area of the shaded region and the area of the circle on AB as diameter?

  • Curvy areas
    problem
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    Curvy Areas

    Age
    14 to 16
    Challenge level
    filled star empty star empty star

    Have a go at creating these images based on circles. What do you notice about the areas of the different sections?

  • problem
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    Track Design

    Age
    14 to 16
    Challenge level
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    Where should runners start the 200m race so that they have all run the same distance by the finish?

  • Semi-detached
    problem
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    Semi-Detached

    Age
    14 to 16
    Challenge level
    filled star filled star empty star

    A square of area 40 square cms is inscribed in a semicircle. Find the area of the square that could be inscribed in a circle of the same radius.

  • Trapezium Four
    problem
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    Trapezium Four

    Age
    14 to 16
    Challenge level
    filled star filled star empty star

    The diagonals of a trapezium divide it into four parts. Can you create a trapezium where three of those parts are equal in area?