Many simple two-dimensional figures are described using its length and width. Weight only refers to 3D objects as well does volume.
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All geometric figures.
Because otherwise you are using figures which imply an accuracy that cannot be justified.
61.37795276 in four significant figures is 61.38
1) Separate the vectors into components (if they are not already expressed as components). 2) Add each of the components separately. 3) If required, convert the vectors back to some other form. For twodimensional vectors, that would polar form.
The answer will depend on the figure. For some plane figures there is a simple formula requiring only a few measurements. For more complicated figures, the formula may be more complicated or you may have to break the figure up into smaller units, measure their areas and sum these. For still more complicated areas you may have to use analogue techniques using the mass of uniform laminae, or approximations using grids.The answer will depend on the figure. For some plane figures there is a simple formula requiring only a few measurements. For more complicated figures, the formula may be more complicated or you may have to break the figure up into smaller units, measure their areas and sum these. For still more complicated areas you may have to use analogue techniques using the mass of uniform laminae, or approximations using grids.The answer will depend on the figure. For some plane figures there is a simple formula requiring only a few measurements. For more complicated figures, the formula may be more complicated or you may have to break the figure up into smaller units, measure their areas and sum these. For still more complicated areas you may have to use analogue techniques using the mass of uniform laminae, or approximations using grids.The answer will depend on the figure. For some plane figures there is a simple formula requiring only a few measurements. For more complicated figures, the formula may be more complicated or you may have to break the figure up into smaller units, measure their areas and sum these. For still more complicated areas you may have to use analogue techniques using the mass of uniform laminae, or approximations using grids.