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Reflecting squarely
In how many ways can you fit all three pieces together to make shapes with line symmetry?
    
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Shady symmetry
How many different symmetrical shapes can you make by shading triangles or squares?
    
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Attractive rotations
Here is a chance to create some attractive images by rotating shapes through multiples of 90 degrees, or 30 degrees, or 72 degrees or...
    
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Growing rectangles
What happens to the area and volume of 2D and 3D shapes when you enlarge them?