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Posted by on Friday, May 23, 2014 at 3:29pm.

How can you measure the angle of incidence and refraction with a protractor? If not, what are some tools I can use which are found at home?

  • Science - , Friday, May 23, 2014 at 3:49pm

    https://www.khanacademy.org/math/geometry/parallel-and-perpendicular-lines/Angle_basics/v/using-a-protractor

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