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Answers for “为什么射线 AC 和射线 BA 不是反向射线?”

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To name a ray, write the endpoint first, followed by a second point in the direction the ray extends, and place a one-way arrow above the letters. The arrow symbol always points to the right in notation, regardless of the drawn direction.

Conditions: The object being named is a ray.; Two points are available: the endpoint and a direction point.