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Identifying parallel and perpendicular lines
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- Slides in PPTX (with click-to-reveal answers)
- Slides in PDF (one slide per page, suitable for importing into IWB software)
- Worksheet (with space for student work)
- Handout (slides with exercises only; 4 per page for reduced printing)
- Card sort (a knowledge of rearranging/ changing the subject is required for this activity)
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Interactive GeoGebra activity: Gradients of perpendicular lines
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