Last updated on June 3rd, 2025
The product of multiplying an integer by itself is the square of a number. Square is used in programming, calculating areas, and so on. In this topic, we will discuss the square of 28.
The square of a number is the product of the number itself. The square of 28 is 28 × 28. The square of a number always ends in 0, 1, 4, 5, 6, or 9. We write it in math as 28², where 28 is the base and 2 is the exponent. The square of a positive and a negative number is always positive.
For example, 5² = 25; -5² = 25.
The square of 28 is 28 × 28 = 784.
Square of 28 in exponential form: 28²
Square of 28 in arithmetic form: 28 × 28
The square of a number is multiplying the number by itself. So let’s learn how to find the square of a number. These are the common methods used to find the square of a number.
In this method, we will multiply the number by itself to find the square. The product here is the square of the number. Let’s find the square of 28.
Step 1: Identify the number. Here, the number is 28.
Step 2: Multiplying the number by itself, we get, 28 × 28 = 784.
The square of 28 is 784.
In this method, the formula, a² is used to find the square of the number. Where a is the number.
Step 1: Understanding the equation
Square of a number = a²
a² = a × a
Step 2: Identifying the number and substituting the value in the equation.
Here, ‘a’ is 28
So: 28² = 28 × 28 = 784
Using a calculator to find the square of a number is the easiest method. Let’s learn how to use a calculator to find the square of 28.
Step 1: Enter the number in the calculator Enter 28 in the calculator.
Step 2: Multiply the number by itself using the multiplication button (×) That is 28 × 28
Step 3: Press the equal to button to find the answer Here, the square of 28 is 784.
Tips and Tricks for the Square of 28
Tips and tricks make it easy for students to understand and learn the square of a number. To master the square of a number, these tips and tricks will help students.
Mistakes are common among kids when doing math, especially when it is finding the square of a number. Let’s learn some common mistakes to master the squaring of a number.
Find the length of the square, where the area of the square is 784 cm².
The area of a square = a²
So, the area of a square = 784 cm²
So, the length = √784 = 28.
The length of each side = 28 cm
The length of a square is 28 cm.
Because the area is 784 cm², the length is √784 = 28.
Sarah is planning to paint her square wall of length 28 feet. The cost to paint a foot is 5 dollars. Then how much will it cost to paint the full wall?
The length of the wall = 28 feet
The cost to paint 1 square foot of wall = 5 dollars.
To find the total cost to paint, we find the area of the wall,
Area of the wall = area of the square = a²
Here a = 28
Therefore, the area of the wall = 28² = 28 × 28 = 784.
The cost to paint the wall = 784 × 5 = 3920.
The total cost = 3920 dollars
To find the cost to paint the wall, we multiply the area of the wall by the cost to paint per foot. So, the total cost is 3920 dollars.
Find the area of a circle whose radius is 28 meters.
The area of the circle = 2,463.008 m²
The area of a circle = πr²
Here, r = 28
Therefore, the area of the circle = π × 28²
= 3.14 × 28 × 28
= 2463.008 m².
The area of the square is 784 cm². Find the perimeter of the square.
The perimeter of the square is 112 cm.
The area of the square = a²
Here, the area is 784 cm²
The length of the side is √784 = 28
Perimeter of the square = 4a
Here, a = 28
Therefore, the perimeter = 4 × 28 = 112 cm.
Find the square of 29.
The square of 29 is 841.
The square of 29 is multiplying 29 by 29. So, the square = 29 × 29 = 841.
Jaskaran Singh Saluja is a math wizard with nearly three years of experience as a math teacher. His expertise is in algebra, so he can make algebra classes interesting by turning tricky equations into simple puzzles.
: He loves to play the quiz with kids through algebra to make kids love it.