Use the Protractor Postulate to prove that if are any three rays or one side of
ID: 2980040 • Letter: U
Question
Use the Protractor Postulate to prove that if are any three rays or one side of a line and having the same end point, then either or .Explanation / Answer
This refers to the uniqueness of a ray forming a given angle with a given ray. Start with ray OA-> (beginning at O, continuing through point A). Place your protractor with the center at O, and the zero-degree ray being OA->. The protractor postulate says that for each ray beginning at O, there is exactly one real number in the range [0, 360) degrees that corresponds to that ray's angle measure from OA. For each ray, there is a unique angle measure (less than 360). For each angle measure, there is a unique ray.
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