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Use the interactivity below to complete the 100 square jigsaws. There are four different versions to try. If you would prefer to work away from a screen, you could print off the pieces to cut out for puzzle 1, puzzle 2, puzzle 3 and puzzle 4.
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Vincent and Tara are making triangles with the class construction set. They have a pile of strips of different lengths. How many different triangles can they make?