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Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now: https://www.khanacademy.org/math/cc-fourth-grade-math/plane-figures/imp-lines-line-segments-and-rays/v/lines-line-segments-and-rays Let's get familiar with the difference between lines, line segments, and rays. Hint: a ray is somewhere between a ...
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