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Cut four triangles from a square as shown in the picture. How many different shapes can you make by fitting the four triangles back together?
Can you make a rectangle with just 2 dominoes? What about 3, 4, 5, 6, 7...?
Arrange the shapes in a line so that you change either colour or shape in the next piece along. Can you find several ways to start with a blue triangle and end with a red circle?