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Maths - Rules - Parallel Lines

Rule 1 Corresponding angles are equal – these are angles in a letter ‘F’.

Rule 2 Alternate angles are equal – these are angles in a letter ‘Z’.

Rule 3 Supplementary angles add up to 180° - these are angles in a letter ‘U’ or ‘C’ (when the ‘U’ and the ‘C’ are made of three straight sides).

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