A circumscribed polygon is a polygon where all its vertices lie on a circle. In other words, the circle passes through all the corners of the polygon.

Here's a breakdown:

* Polygon: A closed figure made up of straight line segments.

* Circle: A set of points that are all the same distance from a central point.

* Circumscribed: Means "drawn around" or "enclosing".

Here's how to visualize it:

Imagine drawing a circle. Then, connect some points on the circle's circumference with straight lines, creating a polygon. The polygon you just formed is circumscribed by the circle.

Example:

A square inscribed in a circle is an example of a circumscribed polygon. Each corner of the square touches the circumference of the circle.

Important Points:

* Every triangle can be circumscribed by a circle.

* Not every polygon can be circumscribed. For example, a general quadrilateral cannot always be circumscribed.

Let me know if you'd like more information or examples!