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Example1

Title: Perimeter of Square

Grade 6+ Lesson s1-l3

Explanation: The best way to understand geometry is by looking at some examples. Take turns and read each example for easy understanding.

Examples

Topics → Definition Example1

The perimeter of a square is 76 cm. What will the new perimeter be if you reduce the side length by 4 cm?

$40%$

Step: 1

The given value for the perimeter of a square (P) is 76 cm.
The formula to determine the length of a side of a square is P = 4s, where s = \$P/4\$.

Explanation:

In this step, A square given perimeter (P) is 76 cm. The formula for the perimeter of a square is P = 4s. To find the length of one side of the square, we use the formula \$s = P/4\$.

Step: 2

Substitute the values \$s = (76)/4\$ = 19.
So, the original side length of the square is 19 cm.
To reduce the side length by 4 cm. The new side length s_new = 19 - 4 = 15 cm.

Explanation:

Based on the calculation, the square’s side length is 19 cm. After reducing the side length by 4 cm, the new side length s_new is calculated as 15 cm from the original length of 19 cm.

Step: 3

To find the new perimeter (P_new) using the same formula:
P_new = 4 S_new
P_new = 4 × 15 = 60 cm
So, reduce the side length of the square by 4 cm, the new perimeter will be 60 cm.

Explanation:

In this step, you can find the new perimeter, P_new, using the same formula: P_new = 4 S_new. Therefore, P_new = 4 × 15 = 60 cm. After reducing the side length of the square by 4 cm, the new perimeter is 60 cm.