It is a polygon that is a closed plane figure with 3 or more straight lines.
a figure, esp. a closed plane figure, having three or more, usually straight, sides.
No. A plane extends to the ends of the universe.
Circle
No, take a semicircle, it is a plane figure and is open. Or a parabola is also open and a plane figure.
It is a polygon that is a closed plane figure with 3 or more straight lines.
The distance around a closed plane figure is called the perimeter. The perimeter of a figure can be calculated by adding together the lengths of each side.
plane figure
a figure, esp. a closed plane figure, having three or more, usually straight, sides.
A triangle whose sides are curved outwards.
polygon
A three sided closed plane figure (shape) is a triangle.
No. A plane extends to the ends of the universe.
a closed plane figure with 3 or more line segments is a polygon
is a closed plane figure
Circle
No, take a semicircle, it is a plane figure and is open. Or a parabola is also open and a plane figure.