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A circumscribed circle or circumcircle passes through all vertices of a plane figure and contains the entire figure in its interior. The center of this circle is called the circumcenter. - read more

In geometry it usually means drawing one shape inside another so that it just touches. For example, the figure on the right is a circle inscribed in a triangle. This is also called the incircle of the triangle. The ... Definition and properties of a quadrilateral inscribed in a circle. - read more

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