Finding perimeter | 3rd grade, 4th grade Math Worksheet | GreatSchools - Free Printable

Let's solve the perimeter problems in the image step by step.

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Task: Find the perimeter of each rectangle and square.

Reminder:
- The perimeter of a rectangle = $ 2 \times (\text{length} + \text{width}) $
- The perimeter of a square = $ 4 \times \text{side length} $

We'll go through each shape one by one.

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#### 1. Top-left rectangle
- Length = 46.3 m
- Width = 25.9 m

$$
\text{Perimeter} = 2 \times (46.3 + 25.9) = 2 \times 72.2 = 144.4 \, \text{m}
$$

✔ Answer: 144.4 m

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#### 2. Top-middle rectangle
- Length = 20.4 m
- Width = 21.8 m

$$
\text{Perimeter} = 2 \times (20.4 + 21.8) = 2 \times 42.2 = 84.4 \, \text{m}
$$

✔ Answer: 84.4 m

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#### 3. Top-right rectangle
- Length = 42.2 m
- Width = 29.6 m

$$
\text{Perimeter} = 2 \times (42.2 + 29.6) = 2 \times 71.8 = 143.6 \, \text{m}
$$

✔ Answer: 143.6 m

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#### 4. Middle-left rectangle
- Length = 44.2 m
- Width = 32.2 m

$$
\text{Perimeter} = 2 \times (44.2 + 32.2) = 2 \times 76.4 = 152.8 \, \text{m}
$$

✔ Answer: 152.8 m

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#### 5. Middle-center rectangle
- Length = 67.8 m
- Width = 37.2 m

$$
\text{Perimeter} = 2 \times (67.8 + 37.2) = 2 \times 105.0 = 210.0 \, \text{m}
$$

✔ Answer: 210.0 m

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#### 6. Middle-right rectangle
- Length = 23.9 m
- Width = 54.0 m

$$
\text{Perimeter} = 2 \times (23.9 + 54.0) = 2 \times 77.9 = 155.8 \, \text{m}
$$

✔ Answer: 155.8 m

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#### 7. Bottom-left rectangle
- Length = 52.3 m
- Width = 37.2 m

$$
\text{Perimeter} = 2 \times (52.3 + 37.2) = 2 \times 89.5 = 179.0 \, \text{m}
$$

✔ Answer: 179.0 m

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#### 8. Bottom-center rectangle
- Length = 65.3 m
- Width = 52.9 m

$$
\text{Perimeter} = 2 \times (65.3 + 52.9) = 2 \times 118.2 = 236.4 \, \text{m}
$$

✔ Answer: 236.4 m

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#### 9. Bottom-right rectangle
- Length = 24.8 m
- Width = 34.6 m

$$
\text{Perimeter} = 2 \times (24.8 + 34.6) = 2 \times 59.4 = 118.8 \, \text{m}
$$

✔ Answer: 118.8 m

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✔ Final Answers:

| Shape | Perimeter |
|------|-----------|
| 1 | 144.4 m |
| 2 | 84.4 m |
| 3 | 143.6 m |
| 4 | 152.8 m |
| 5 | 210.0 m |
| 6 | 155.8 m |
| 7 | 179.0 m |
| 8 | 236.4 m |
| 9 | 118.8 m |

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🔍 Additional Note:

The "Find the perimeter of this triangle" section at the top seems to be a separate task, but it shows side lengths:
- 27.3 m
- 27.3 m
- 17.2 m

So, for that triangle:
$$
\text{Perimeter} = 27.3 + 27.3 + 17.2 = 71.8 \, \text{m}
$$

✔ Triangle Perimeter: 71.8 m

But since the main task is about rectangles and squares, and the triangle is just an example or extra practice, the primary answers are the ones above.

Let me know if you'd like these written on a worksheet format!