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Creating convincing arguments or "proofs" to show that statements are always true is a key mathematical skill. The problems in this feature offer you the chance to explore geometrical properties, make conjectures and create proofs to show that these are always true.
Many of the problems in this feature include proof sorting activities which challenge you to rearrange statements in order to recreate clear, rigorous proofs.
Plus magazine has a selection of interesting articles exploring proofs in which pictures play an important role.
We are very grateful to the Heilbronn Institute for Mathematical Research for their generous support for the development of these resources.