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5: the rectangle could have the following dimensions: 1*80, 2*40, 4*20, 5*16, 8*10. Notice that these are just all of pairs of numbers that multiply to 80.

Q: How many times can 80 tiles be arranged in a rectangular shape?

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Area of a rectangle is length times width.

Length . . . any multiple of 15' Width . . . . any multiple of 15'

About 100 but that depends on the shape of the 80 sq ft surface being covered and whether you are willing to cut the tiles several times or not. 100*13*9=11700 sq in 80*144=11520 sq in so you don't even have two tiles over if the shape were perfect for the tiles.

4 times the number of tiles in the length of the rectangle.

Rooms are generally rectangular in shape, so the floor space is the length times the width. Add up all the rooms (and corridors or other spaces) and you get the total for the house. If you have spaces that are not rectangular, then the calculations become a bit more complicated, but you can usually estimate a rectangular equivalent.

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Area of a rectangle is length times width.

The area of any rectangular shape, including the square, is the length times the breadth. Area = length x breadth

Length . . . any multiple of 15' Width . . . . any multiple of 15'

About 100 but that depends on the shape of the 80 sq ft surface being covered and whether you are willing to cut the tiles several times or not. 100*13*9=11700 sq in 80*144=11520 sq in so you don't even have two tiles over if the shape were perfect for the tiles.

tiles that were made in the medieval times

4 times the number of tiles in the length of the rectangle.

Assuming the shape is a rectangular prism, its volume is 2*3*2 = 12 cm3

Assuming your measurements also account for the tile grout, 5cm goes into 100cm 20 times, and 12cm goes into 144cm 12 times, so 20 * 12 = 240 tiles.

Rooms are generally rectangular in shape, so the floor space is the length times the width. Add up all the rooms (and corridors or other spaces) and you get the total for the house. If you have spaces that are not rectangular, then the calculations become a bit more complicated, but you can usually estimate a rectangular equivalent.

no you are trying to get rid of all your tiles.

1 white tile plus 4 red tiles equals 5 tiles total. To find the number of tiles in 6 times the pattern would be 6 x 5 which equals 30

You measure the linear inches with a ruler or tape measure, then you do the calculation to find out the area (length times width, if it is a rectangular shape).