Any closed figure that is not entirely composed of straight sides, such as an ellipse or a circle.
Circle
A shape cannot have only one side because it would not be closed. A shape must have at least three sides to be a closed figure (no "gaps")
Both ends of the line must join together, as in a circle, loop, or a closed figure.
yes, a triangle is a closed figure
closed figure
yes a circle is closed but is not a polygon
Circle
circle
a circle. A square, circle, rectangle, or triangle.
Any closed figure that is not entirely composed of straight sides, such as an ellipse or a circle.
Circle
semi circle
Circle
An ellipse.
Any closed figure formed by a set of straight linesegments is a polygon. If the segments are curved such as in a circle or oval, the closed figure is not a polygon.
a semi-circle