The side length of a square steel plate is C decimeter, and its circumference is C decimeter______ Decimeter, area is______ Square decimeter

The side length of a square steel plate is C decimeter, and its circumference is C decimeter______ Decimeter, area is______ Square decimeter

C × 4 = 4C (decimeter), C × C = C2 (square decimeter); answer: the perimeter of a square is 4C decimeter, the area is C2 square decimeter