1 To 20 Square, Square Chart, Square Value, Square Number, Square Value List, Square PDF Download, Square Online Test, Square Trick

SUMMARY

## 1 to 20 Square

When we multiply a number twice by itself, then the product we get is the square of that number. The value of squares 1 to 20 ranges from 1 to 400. Memorizing the values of these squares will help the students to simplify time-consuming equations quickly. The square of a number in exponential form is expressed as (x)2.

## 1 to 20 Square of a Negative Number

The Square of a number can be found by multiplying the number by itself. The product of two negative numbers is always positive. If we find the square of a negative number, say -x, where x > 0, then (-x) × (-x) = x2. Therefore, the square of a negative number is always positive.

a) 144

b) 256

c) 121

d) 361

a) 121

b) 144

c) 64

d) 169

a) 80

b) 64

c) 88

d) 49

a) 144

b) 256

c) 324

d) 361

a) 256

b) 169

c) 8

d) 64

a) 7

b) 196

c) 256

d) 121

a) 256

b) 144

c) 121

d) -121

## Solved Examples of Square

#### Example 1: Find the area of a square window whose side length is 12 inches ?

Solution :

Area of Square window (A) = (side)2

i.e. A = (12)2= 144

Therefore, the area of the square window is 144 inches2.

#### Example 2: If a circular outlet window has a radius of 20 cm, find the area of the circular window ?

Solution :

Area of circular window (A) = π(radius)2

i.e. A = π(20)2 = 1256 cm2.

Therefore, the area of the circular window is 1256 cm2.

#### Example 3: What is the square of -11 ?

Solution :

Square of -11 = (-11)2 = -11×-11 = 121.

Example 4: Evaluate 42+72+92+52.

Solution :

=(4×4)+(7×7)+(9×9)+(5×5)

=16 + 49 + 81 + 25

= 171 Ans

## FAQs

### What is the square of 1 to 20?

Ans: Square numbers from 1 to 25 are 1, 4, 9, 16, 25, 36, 49, 64, 81, 100, 121, 144, 169, 196, 225, 256, 289, 324, 361 and 400.

Ans: 400

Ans: 289

Ans: 4

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