Valencian Community PAU Technical Drawing II Practice Questions - Valencian Community PAU Technical Drawing II (Dibujo Técnico II Dibuix Tècnic II) Exam

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Two non-concentric circles $C_1$ (radius $r_1 = 30\text{ mm}$) and $C_2$ (radius $r_2 = 20\text{ mm}$) have centers separated by distance $O_1O_2 = 60\text{ mm}$. What is the geometric locus of points having equal power with respect to both circles?

The line segment connecting $O_1$ and $O_2$ A circle concentric with $C_1$ passing through $O_2$ A straight line perpendicular to the line of centers $O_1O_2$ An ellipse with foci at $O_1$ and $O_2$

Correct Answer:

A straight line perpendicular to the line of centers $O_1O_2$

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