Question

1. a polygon with 8 sides is called a: mark only one oval. hexagon octagon decagon nonagon 8. which of the following is not a polygon? mark only one oval. triangle circle pentagon quadrilateral 9. a polygon with all sides congruent and all angles congruent is: mark only one oval. irregular regular concave convex

Explanation:

1. By definition, an octagon is a polygon with 8 sides.
2. A polygon is a closed - figure made up of straight line segments. A circle is made up of a curved line, so it is not a polygon.
3. A regular polygon has all sides congruent and all angles congruent.

Answer:

1. B. Octagon
2. B. Circle
3. B. Regular