(any unit of length or distance) divided by (any unit of time)2
can be a unit of acceleration.
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The answer depends on whether the measurements are univariate, bivariate or multivariate.
use your ruler to measure the sides
You can use either. Of course, using the standard system (centimeters) is preferable. If measurements are given in inches, by adding the sides, the final result will also be in inches. If sides are given in anstroms, perimeter will also be in angstroms. Etc.You can use either. Of course, using the standard system (centimeters) is preferable. If measurements are given in inches, by adding the sides, the final result will also be in inches. If sides are given in anstroms, perimeter will also be in angstroms. Etc.You can use either. Of course, using the standard system (centimeters) is preferable. If measurements are given in inches, by adding the sides, the final result will also be in inches. If sides are given in anstroms, perimeter will also be in angstroms. Etc.You can use either. Of course, using the standard system (centimeters) is preferable. If measurements are given in inches, by adding the sides, the final result will also be in inches. If sides are given in anstroms, perimeter will also be in angstroms. Etc.
No the given measurements would not make a triangle because in order to construct a triangle the sum of its smallest sides must be greater than its longest side.
Using trigonometry and Pythagoras' theorem.