-4 squared equals 16, because (-4) × (-4) = 16.
Once 16 = (-4) × (-4), 16 is also known as a, so called, perfect square.
Use the square calculator below to the square o any real number. See also, the definition and examples of squared numbers.
What is a square and how to calculate its volume?
A square is a two dimensional figure which has its two edges of equal length. The area of a square is given by the product of its two dimensions. For example, if a square has its edge length equal to ‘a’ centimeters the area of the square is given by the product "a × a" which is equal to a2. The square shown has its edges equal to 4 units. So, its area is:
a2 = a × a × a = a2 = 4 × 4 × 4 = 64 units or cubic centimeters (64 cm2) (if we choose our area unit as square centimeters).
A perfect square is a number that can be expressed as the product of two equal integers.
A perfect square, also called a square number, is a number written by using the formula Sn = n2, where n is an integer.
Image credits: mathsisfun.com
Notice that:
- 0 squared is 0 (just make n = 0 in the formula Sn = n2)
- 1 squared is 1 (just make n = 1)
- Negative 0 squared is 0 (just make n = 0)
- Negative 1 squared is 1 (just make n = 1)
Squared Numbers or Perfect Square Table from 0 to 1002
Reference:
- Square Number (wolfram.com)
Sample Squared or Perfect Squares
- 52 squared
- 18 squared
- -74 squared
- 0 squared
- 59 squared
- 20 squared
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