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It depends first of all on whether or not the decagon is regular. If it is not regular, there are two main options: one is to divide it into sections for which there are simple formulae, and sum the results. The alternative is to copy the shape onto a lamina of uniform mass, measure the mass (or weight) of the shape and of a square of unit size and use the ratio of the masses to estimate the area of the shape.

Area of shape = (Mass of copied shape/Mass of unit square)*Area of unit square

The last term has value 1, but is included so that the equation is balanced in its dimensions.

If the shape is regular, then it depends on what information is given.

Q: How do you measure the square footage of a decagon?

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Square footage is an area - i.e a length (measured in feet) multiplied by a width (again, measured in feet). To measure square feet, measure the length, and width you require, then multiply them together. The resulting number is the "square footage".

Your question does not make sense. 100 yards is a measure of length, but square footage is a measure of area.

You can't, a hole has volume and thefore needs to be measured in cubic footage. Square footage is a measure of area not volume.

Measure the length and height of thesign using a foot measure. Then multiply the lenght by the height and this will give you the square footage of the sign.

Four dimensions?

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Square footage is an area - i.e a length (measured in feet) multiplied by a width (again, measured in feet). To measure square feet, measure the length, and width you require, then multiply them together. The resulting number is the "square footage".

Your question does not make sense. 100 yards is a measure of length, but square footage is a measure of area.

Square footage is a measure of an area. It is usually for areas for which square feet is a sensible measurement unit, such as a room, or a house. However, we have had people asking about the square footage of countries!

Square footage.

There is no way to compare these two things. Square footage is a measure of area, while cubic feet is a measure of volume.

Measure the length and height of thesign using a foot measure. Then multiply the lenght by the height and this will give you the square footage of the sign.

You can't, a hole has volume and thefore needs to be measured in cubic footage. Square footage is a measure of area not volume.

Square footage is a measure of an area. It is usually for areas for which square feet is a sensible measurement unit, such as a room, or a house. However, we have had people asking about the square footage of countries!

Measure the height of the wall from floor to ceiling. Measure the width of the wall. Multiply height x width = square footage. For square yards, divide the square footage by 9.

The square footage is determined by measuring the width and the depth of the room. If the closet is 3ft deep and 4ft wide, then multiply 3x4 and your square footage is 12. 12sqft

measure it or ask the building contracter

Four dimensions?