A perimeter is not type of figure. It is the distance measured around the outside of any figure. It could be a circle, triangle, square, rectangle or irregular polygon, for example.
One way to draw a figure WITH a 15 cm perimeter would be to draw an equilateral triangle with side lengths of 5 cm. There are an infinite number of other ways.
how to draw a 15 cm and 9 cm perimeter
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