A square root is the factor of a number once squared. for example √100 is 10.
10 x 10 or 102= 100.
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Undefined. You would have to define the meaning of a square root on a two dimensional object.
As nobody has yet managed to fully define pi, we cannot come up with a square root for it. For most textbooks the value of pi is usually approximated to 3.1416. The square root of that is 1.772455923288362, and you may round that off to whatever number of decimal places you require.
No, there is no real number that satisfies the equation √(-28). The square root of a negative number is not defined in the real number system. However, if we extend our number system to include complex numbers, we can define a square root of -28 as √(-28) = 2√7i, where i is the imaginary unit.
There are infinitely many of them. They include square root of (4.41) square root of (4.42) square root of (4.43) square root of (4.44) square root of (4.45) square root of (5.3) square root of (5.762) square root of (6) square root of (6.1) square root of (6.2)
A principal square root is any square root that's answer is positive, and a perfect square root is a square root that's answer is an integer.