Assuming the 23cm refers to the length of its side, the area is 23*23 = 529 cm2
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A square with a side length of 23 cm has an area of 529 cm2
The area of 23cm by 5cm is 115 square cm.
when a square of something,how big it is like if you want square tile you mesuare the tile and all the other ones are the same.
You calculate the square feet of the room/ area. A square feet is still a square feet, no matter on the dimension of the tile
Area of tile = 4 sq feet. Area to cover = 10 square feet. Number of tiles = 2.5 (ie 3) since you cannot buy half a tile.