Q: What is the square of 21?

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21*21 = 441 square feet.21*21 = 441 square feet.21*21 = 441 square feet.21*21 = 441 square feet.

The square root of -21 is: 4.582576 i

The square root of 21 is 4.58257569495584.

The square root of 21 is 4.58257569495584.

21 is not the square of an integer. The closest square number is 25.

21 square meters is 226.04 square feet.

21 feet by 21 feet is a square having an area of 441 square feet.

21 feet by 21 feet is 441 square feet which converts to 49 square yards.

There is no exact value for the square root of 21. √21 = 4.5825757 (7dp)

21The square root of 441 is 21

Area = 21*21 = 441 square yards

To square a number, you multiply it by itself. In this case, 21 x 21 is 441

It is: 21 times 21 = 441

21 x 21 = 441 square feet

21*21 = 441 square feet.

21 x 21 = 441 square inches

441 has two square roots; 21 or -21.

4.6 is a better approximation to the square root of 21.

The square root and square functions are inverse of one another EXCEPT that square root is not really a function: it is a 1-to-many mapping. So sqrt(square(21)) = sqrt(441) = Â±21

They are 21 and -21.

Square feet measure area, and yards measure length. If you mean FEET in 21 yards, the answer is 63 (3 times 21). If you mean square feet in 21 SQUARE YARDS, the answer is 189 (three times three times 21).

The square roots of 21 are 4.5826 (rounded) and the negative of the same number.

area of square, formula:A=a*a or a^2plug the knownA=21*21A= 441 m^2 ;))

(√(a))²=a The square root and the square cancel to leave just 49/21■

21*3 = 63 square feet.