Angles, Polygons and Geometrical Proof

  • Estimating angles
    game
    Favourite

    Estimating Angles

    Age
    7 to 14
    Challenge level
    1 out of 3

    How good are you at estimating angles?

  • Polygon Pictures
    problem
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    Polygon Pictures

    Age
    11 to 14
    Challenge level
    1 out of 3

    Can you work out how these polygon pictures were drawn, and use that to figure out their angles?

  • An Equilateral Triangular Problem
    problem
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    An Equilateral Triangular Problem

    Age
    11 to 14
    Challenge level
    1 out of 3

    Take an equilateral triangle and cut it into smaller pieces. What can you do with them?

  • Quadrilaterals game
    game
    Favourite

    Quadrilaterals Game

    Age
    11 to 14
    Challenge level
    1 out of 3

    A game for 2 or more people, based on the traditional card game Rummy.

  • Tilted Squares
    problem
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    Tilted Squares

    Age
    11 to 14
    Challenge level
    1 out of 3

    It's easy to work out the areas of most squares that we meet, but what if they were tilted?

  • Triangles in circles
    problem
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    Triangles in Circles

    Age
    11 to 14
    Challenge level
    1 out of 3

    Can you find triangles on a 9-point circle? Can you work out their angles?

  • Hidden Squares
    problem
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    Hidden Squares

    Age
    11 to 14
    Challenge level
    1 out of 3

    Can you find the squares hidden on these coordinate grids?

  • Completing Quadrilaterals
    problem
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    Completing Quadrilaterals

    Age
    11 to 14
    Challenge level
    1 out of 3

    We started drawing some quadrilaterals - can you complete them?

  • Guess \my Quad
    problem
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    Guess My Quad

    Age
    11 to 14
    Challenge level
    1 out of 3

    How many questions do you need to identify my quadrilateral?

  • Polygon Rings
    problem
    Favourite

    Polygon Rings

    Age
    11 to 14
    Challenge level
    1 out of 3

    Join pentagons together edge to edge. Will they form a ring?