**Square root of 18**

If you are wondering what the square root of 18 is, it is approximately 4.243. Similar to the square root of 25, the square root of a number (18 in this case) is a value that, when multiplied by itself, results in the original number (18). Mathematically, the square root of 18 can be expressed in either radical or exponent form:

-Radical form of the square root of 18: √18

-Exponent form of the square root of 18: 18^(1/2) or 18^(0.5)

The symbol √ is generally referred to as either the radical sign or the radix. The number for which we are calculating the square root is called the radicand, and in this case, it is the number located beneath the radical sign (radix).

-Radical form of the square root of 18: √18

-Exponent form of the square root of 18: 18^(1/2) or 18^(0.5)

The symbol √ is generally referred to as either the radical sign or the radix. The number for which we are calculating the square root is called the radicand, and in this case, it is the number located beneath the radical sign (radix).

**Calculator for Square Root of 18**

If you want to calculate the square root of a number, including the value of the square root of 18, you can use a square root calculator.

# Square Root Calculator

**Calculation Guide of Square root of 18**

Our discussion will focus on the square root of 18, where we will provide a calculation guide and address commonly asked questions such as whether the square root of 18 is rational or irrational and whether 18 is a perfect square.

Below, you will find all the necessary information regarding the calculations for the square root of 18.

Below, you will find all the necessary information regarding the calculations for the square root of 18.

**What is the square root of 18?**

The square root of 18 is the value that, when multiplied by itself, results in 18. Therefore, the square root of 18 is approximately 4.243, since 4.243 x 4.243 ≈ 18.

Therefore,

Therefore,

**ANSWER:**Square root of 18 ≈ √18 ≈ 4.243**Is 18 a Perfect Square?**

If a number can be expressed as the square of a whole number (which is also known as an integer), it is referred to as a perfect square. The whole numbers comprise of 0, 1, 2, 3, 4, 7, 8, and 9. Multiplying a number by itself is the process of squaring it. For example, 81 is a perfect square since it results from 9 squared, which is equivalent to multiplying 9 by 9. It is essential to note that 9 is a whole number (integer). However, numbers such as -5, 7.025, or 5 ½ are not whole numbers and cannot be classified as perfect squares.

In our example, the square root of 18 is not a whole number, which means that 18 is not a perfect square.

In our example, the square root of 18 is not a whole number, which means that 18 is not a perfect square.

**ANSWER:**18 is not a perfect square.**Is the number 18 a rational or irrational square root?**

An irrational number is a numerical value that cannot be represented as a quotient of two integers. In contrast to rational numbers, irrational numbers cannot be expressed as a fraction, and their decimal form does not have a repeating or terminating pattern.

In our case, the square root of 18 cannot be expressed as a ratio of two whole numbers, which means that it is an irrational number.

In our case, the square root of 18 cannot be expressed as a ratio of two whole numbers, which means that it is an irrational number.

**ANSWER:**The square root of 18 can be classified as an irrational number.**Principal square root of 18**

There are always two square roots for every positive number, one of which is positive and the other negative. The positive square root is commonly known as the "principal square root". When we calculate "the square root of a number," we usually refer to the principal square root.

In our case,

In our case,

**the principal square root of 18 is approximately 4.243,**which is written as √18 ≈ 4.243.