The answer very much depends on the object. There are many formulas for areas of many common objects. Sometimes there is not formula and you must approximate it.
Unfortunately, the question lacks enough specificity to be answered.
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To find the the area of a shape is to find the space that is enclosed within a 2D object. Do not mix it up with volume, which is the space enclosed within a 3D object.
Calculus can be used to find the surface area of any object given that you know the equation describing said object. It's usually easier to find the area from experiment or through using a combination of existing models to approximate the surface area
it depends on your object. if your object is a triangle the area in square units is .5base times hieght if your object is a circle the area in square units is pi time radius squared if your object is a rectangle the area in square units is length times width
The area is the amount of space in a 2-D object. A polynomial can be almost every object you can think of. You have to be specifica nd ask which polynomial you want the area to be found in.
If the object is a circle and if 9.5 is the diameter, the area is 70.88 and the circumference is 29.85