Parallel & Perpendicular

IB Maths Studies / Applications: Parallel & Perpendicular

"How can we tell if two lines are at right angles to each other?"Can you draw two lines that are at right angles to each other without measuring the angle? What different ways are there of doing this? Can we use coordinate geometry to justify that two lines are at right angles to each other? This activity is all about bringing together the different degrees of geometrical reasoning that we can use to answer these questions....

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