1

Problem

If the perimeter of a square is 20 cm, then find the length of each side.

2

Step

Perimeter of a square is

20cm

3

Step

The perimeter of a square is 20 cm, and the perimeter means the sum of all four sides.

4

Step

Here, we want to find the sides.

5

Hint

To find the sides of a square by using

p = 4s s = \$p/4\$

6

Step

Substitute the values

s = \$(20)/4\$

7

Step

After simplification the s value is

s = 5

8

Step

So, the sides of a square is 5cm.

9

Solution

So, the all sides of a square is 5cm, 5cm, 5cm, 5cm.

10

Sumup

Please summarize steps

Choices

11

Choice-A

This is not correct because it doesn’t match the correct calculation for the perimeter of a square

Wrong 1 cm

12

Choice-B

This is not correct because it doesn’t match the correct calculation for the perimeter of a square

Wrong 50 cm

13

Choice-C

This is not correct because it doesn’t match the correct calculation for the perimeter of a square

Wrong 4 cm

14

Choice-D

This is correct because it correctly corresponds to the side length of a square that has a perimeter

Correct 5 cm

15

Step

Option

D

16

Sumup

Please summarize choices