Lesson Example Discussion Quiz: Class Homework |
Example |
Title: Perimeter of Square |
Grade: 6-a 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:
The perimeter of a square is 76 cm . If you reduce the side length with 4 cm,what will be the new perimeter?
Step 1a
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The given value for the perimeter of a square is 76 cm. |
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Explanation: The value provided for the perimeter of a square is 76 cm. |
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Step 1b
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Perimeter of a square formula P = 4s We need to determine the length of a side of a square. s = \$p/4\$ |
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Explanation: The formula for calculating the perimeter of a square: P = 4s. We need to find the length of one side of a given square. s = \$P/4\$. |
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Step 1c
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Substitute the values s = \$76/4\$ = 19 So, the original side length of the square is 19 cm. |
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Explanation: Based on the calculation, the side length of the square is determined to be 19 cm. |
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Step 1d
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Now, you want to reduce the side length by 4 cm. The new side length s_new = 19 - 4 = 15 cm |
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Explanation: 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. |
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Step 1e
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Now, you can find the new perimeter (P_new) using the same formula: P_new = 4S_new P_new = \$4 \times 15\$ = 60 cm |
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Explanation: Now you can find the new perimeter, P_new, using the same formula: P_new = 4S_new. Therefore, P_new = \$4 \times 15\$ = 60 cm. |
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Step 1f
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So, if you reduce the side length of the square by 4 cm, the new perimeter will be 60 cm. |
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Explanation: After reducing the side length of the square by 4 cm, the new perimeter is 60 cm |
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