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A set of three lines that has one point of intersection

A set of three lines that has one point of intersection-example-1
User Scls
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This construction called a pencil of lines. That figure can have 3,4,5.... any number of  straights lines. The main rule is their common point. And it looks like spokes of a wheel. Here you can find a lot of vertical angles and rays.
User Facundo Larrosa
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