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If the rooftop is flat and shaped like a rectangle ...

-- measure the width of the roof, in meters

-- measure the length of the roof, in meters

-- multiply (width) x (length)

-- The product is the area of the roof in square meters.

If the rooftop is not shaped like a rectangle, or parts of it are sloped, then

you must mark it off in several sections, with each section being a rectangle.

Then measure and calculate the area of each section as described above, and

add them up.

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Q: How do you work out the square meters of a roof?
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