+Foci are special points integral to defining curves like ellipses and hyperbolas, guiding their unique shapes. In optics, a focus is where rays of [Light](/wiki/Light) meet, concentrating energy. These pivotal points illuminate the hidden structure of various [Geometric Shapes](/wiki/Geometric_Shapes) and physical phenomena.
+## See also
+- [Ellipse](/wiki/Ellipse)
+- [Parabola](/wiki/Parabola)
+- [Hyperbola](/wiki/Hyperbola)
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