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If you mean the surface area of geometric figures, that depends on the figure you are working with. For example, for a rectangle, just multiply the length (in inches) by the width (in inches). The answer will be the area, in square inches.
There are formulae for the areas of polygons: fairly straightforward in the case of regular polygons but in the case of irregular polygons you may need to partition them into triangles, find the area of each part and add up the components. There are also formulae for areas of circles and ellipses so if the shape in question can be partitioned into a rectangle with a triangular "roof" and a semicircular bulge, you can calculate their areas separately and add them together.
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How do you calculate the circumferance of a circle with the area 256 square inches?
pi * 2 * square root(256 / pi) = 56.7185232 inches
Calculate the area of a poster that measures 40 inches by 14 inches?
Area = 40 * 14 = 560 square inches.
What is 70 sq ft in feet and inches?
Area can't be directly converted to length. If it could, then you'd be ableto calculate how many inches of land there are in your front yard, andyou'd also be able to go the other way and calculate how many acres wideyour kitchen is.1 square foot = 144 square inches.Knowing that, you can take as many of those 70 square feet as you want toand turn them into square inches.
How many square inches is in 16X20 inches?
320 square inches
How many square inches are in 35 square feet?
There are 144 square inches in a square foot. This calculates out to be 5,040 square inches.
