Question: how do you find the perimeter of a plane figure?
Answer: Name. Figure. Formula. Nomenclature. Triangle. Perimeter: P=a+b+c. Area: A=12bh. a,b,c:sides. b:base. h:height. Square. Perimeter: P=4a. Area: A=a2. a:side. Rectangle. Perimeter: P=2b+2h. Area: A=bh. b:base. ... 
Usage. To find the area of basic figures.
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