Which test device is a cross between a protractor and a ruler and tests joint flexibility?

• A. Leighton Flexometer
• B. Altimeter
• C. Goniometer
• D. Fleximometer

Answer: (C)

Measuring how far a joint can move relies on a tool that provides a precise angle. The goniometer does this perfectly. It has a protractor-like scale and two arms that act like rulers. You align one arm with the reference segment and the other with the moving segment, position it at the joint’s landmarks, and read the angle on the scale. That angle value represents the joint’s range of motion, directly capturing flexibility. Other devices mentioned aren’t designed to give this kind of angular ROM reading, so they don’t fit the description as well.