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The Transversal Detective
The Transversal Detective
When a line crosses two parallel lines (called a transversal), it creates 8 angles. But here's the magic: there are only really 2 different angle sizes! Once you know one angle, you can work out all the others using three simple rules.
Visual: Angles in Parallel Lines
The Three Key Rules
Also called: Co-interior angles = Allied angles = Interior angles
Now try it yourself
Quiz · Question 1 of 12
Two parallel lines are cut by a transversal. Which statement about alternate angles is correct?
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