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        Featured resource

        P_GT_T4_E2_A1_fig2

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        An equilateral triangle, with an arrow to its right pointing to an ‘open square’ (three sides). To its right another arrow, pointing to a complete square.

        Making a triangle into a square.

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        A spider web, with several radiating construction threads and multiple cross threads joining them.

        P_GT_T1_E1_...

        A photo of a house known as a 'Queenlander', with each side a mirror image of the other.

        P_GT_T1_E1_...

        Close up of an approximately symmetrical green leaf with central vein.

        P_GT_T1_E1_...

        Four arrays of dots: a single dot, a square made of 4 dots (2 by 2), a square made of 9 dots (3 by 3) and a square made of 16 dots (4 by 4).

        P_GT_T4_E2_...

        A 10 by 10 grid marked with the numbers 1 to 100 starting at the top left corner and continuing in rows.

        P_GT_T3_E1_...

        A square with an arrow to its right pointing to an 'open pentagon' (four sides). To its right is another arrow pointing to a complete pentagon.

        P_GT_T4_E2_...

        An equilateral triangle and a square. The side lengths of both figures are equal.

        P_GT_T4_E2_...

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