A9b – Identifying parallel and perpendicular lines

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Identifying parallel and perpendicular lines

Teacher resources

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Links to past exam questions

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Interactive GeoGebra activity: Gradients of perpendicular lines

Move around the blue points to see the relationship between perpendicular lines.
With thanks to Tim Brzezinski, whose Perpendicular Lines Investigation (VB) worksheet is available here. Material modified and embedded here under the CC-BY-SA 3.0 license.
In the real world

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