A goniometer is used in the medical field to measure a joints range of motion. It can be helpful in determining if a patient is lacking in mobility due to an injury, or how well he is recovering after sustaining an injury.

The term “goniometer” comes from two Greek words that mean “angle” and “measure”. This is essentially what you are doing when you measure range of motion-measuring an angle. There are three types Goniometer. 4.5" & 8"  have 180° protractor scale halfround model 10" have full round 360° protractor scale.

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