A straightedge and compass.
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ruler tracing paper those are the wrong answers its Straightedge & Compass
bicycle wheels, door knobs, gas stoves and etc.
Find the use in the following link: "Calculation of the geometric mean of two numbers".
The Cartesian coordinate system allows a geometric curve to be described in algebraic terms. This then allows the use of algebraic tools including differentiation and integration to be used to solve geometric problems such as the turning points of curves, their volumes of rotation and so on. It also enables geometric methods to be applied to solving algebraic problems.