To solve this problem, we need to find the
area and
perimeter of each rectangle or square shown in the worksheet.
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🔢 Quick Review:
-
Area = length × width
(For squares, since all sides are equal: Area = side × side)
-
Perimeter = 2 × (length + width)
(For squares: Perimeter = 4 × side)
We’ll go one by one from #1 to #12.
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✔ Problem-by-Problem Solutions:
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1. Rectangle: 7 cm × 20 cm
- Area = 7 × 20 =
140 cm²
- Perimeter = 2 × (7 + 20) = 2 × 27 =
54 cm
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2. Rectangle: 3 ft × 8 ft
- Area = 3 × 8 =
24 ft²
- Perimeter = 2 × (3 + 8) = 2 × 11 =
22 ft
---
3. Rectangle: 11 in × 9 in
- Area = 11 × 9 =
99 in²
- Perimeter = 2 × (11 + 9) = 2 × 20 =
40 in
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4. Rectangle: 9 in × 5 in
- Area = 9 × 5 =
45 in²
- Perimeter = 2 × (9 + 5) = 2 × 14 =
28 in
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5. Square: 4 in × 4 in
- Area = 4 × 4 =
16 in²
- Perimeter = 4 × 4 =
16 in
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6. Rectangle: 6 cm × 3 cm
- Area = 6 × 3 =
18 cm²
- Perimeter = 2 × (6 + 3) = 2 × 9 =
18 cm
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7. Square: 9 in × 9 in
- Area = 9 × 9 =
81 in²
- Perimeter = 4 × 9 =
36 in
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8. Rectangle: 11 in × 6 in
- Area = 11 × 6 =
66 in²
- Perimeter = 2 × (11 + 6) = 2 × 17 =
34 in
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9. Rectangle: 12 cm × 7 cm
- Area = 12 × 7 =
84 cm²
- Perimeter = 2 × (12 + 7) = 2 × 19 =
38 cm
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10. Rectangle: 3 ft × 12 ft
- Area = 3 × 12 =
36 ft²
- Perimeter = 2 × (3 + 12) = 2 × 15 =
30 ft
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11. Rectangle: 4 cm × 11 cm
- Area = 4 × 11 =
44 cm²
- Perimeter = 2 × (4 + 11) = 2 × 15 =
30 cm
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12. Rectangle: 7 in × 3 in
- Area = 7 × 3 =
21 in²
- Perimeter = 2 × (7 + 3) = 2 × 10 =
20 in
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Final Answer:
1. Area: 140 cm², Perimeter: 54 cm
2. Area: 24 ft², Perimeter: 22 ft
3. Area: 99 in², Perimeter: 40 in
4. Area: 45 in², Perimeter: 28 in
5. Area: 16 in², Perimeter: 16 in
6. Area: 18 cm², Perimeter: 18 cm
7. Area: 81 in², Perimeter: 36 in
8. Area: 66 in², Perimeter: 34 in
9. Area: 84 cm², Perimeter: 38 cm
10. Area: 36 ft², Perimeter: 30 ft
11. Area: 44 cm², Perimeter: 30 cm
12. Area: 21 in², Perimeter: 20 in
Parent Tip: Review the logic above to help your child master the concept of area worksheets for 3rd graders.
![FREE Area And Perimeter Worksheets Grade 3 [PDFs] Brighterly](/images/3-morning-work-sports2-pic-6.jpg)
