The answer is C. Compass.
Compass isn't used in the geometric constructions.
Among pencil, protractor, compass, ruler protractor is not used in the geometric constructions.
Geometric construction refers to the process of drawing lines, angles and other geometric shapes and figures using only a compass and a ruler.
There are four things pencil, protractor, compass, ruler.
For any drawing we need a pencil, To draw straight lines we need a ruler and to draw circles we need to use compass.
Learn more about geometric constructions at https://brainly.com/question/7386615
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