Answer:
Straightedge and Compass.
Explanation:
The most common tool used to complete geometric constructions is the straightedge and compass. These two tools are sufficient to construct any geometric figure that can be constructed using only these two tools.
The straightedge is a straight line without any markings on it. It can be used to draw lines and segments, and to extend lines and segments.
The compass is a tool with two legs, one longer than the other. The longer leg is used to draw circles, and the shorter leg is used to mark points on circles.
There are a few other tools that can be used for geometric constructions, such as the protractor and the ruler. However, the straightedge and compass are the most basic and fundamental tools for geometric constructions.
Here are some examples of geometric constructions that can be completed using a straightedge and compass:
Perpendicular lines
Parallel lines
Angle bisectors
Triangles
Circles
Polygons
If you are interested in learning more about geometric constructions, there are many resources available online and in libraries. You can also find many software programs that allow you to create and explore geometric constructions.