Let’s solve each rectangle one by one. Remember:
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Area = number of squares inside → count them or multiply length × width.
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Perimeter = distance around the outside → add up all the sides.
Each square is 1 cm, so we can count units along the edges.
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Problem 1)
Rectangle: 5 squares wide, 2 squares tall
→ Area = 5 × 2 =
10 square cm
→ Perimeter: top (5) + bottom (5) + left (2) + right (2) = 5+5+2+2 =
14 cm
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Problem 2)
Rectangle: 6 squares wide, 1 square tall
→ Area = 6 × 1 =
6 square cm
→ Perimeter: top (6) + bottom (6) + left (1) + right (1) = 6+6+1+1 =
14 cm
Wait — let me double-check that. If it’s only 1 row high, then height = 1. So perimeter = 2×(length + width) = 2×(6+1) = 2×7 =
14 cm ✔
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Problem 3)
Rectangle: 4 squares wide, 4 squares tall → it’s a square!
→ Area = 4 × 4 =
16 square cm
→ Perimeter = 4 + 4 + 4 + 4 =
16 cm
Or 2×(4+4) = 16 cm
✔
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Problem 4)
Rectangle: 7 squares wide, 3 squares tall
→ Area = 7 × 3 =
21 square cm
→ Perimeter = 2×(7+3) = 2×10 =
20 cm
Check: top 7, bottom 7, left 3, right 3 → 7+7+3+3 = 20
✔
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Problem 5)
Rectangle: 6 squares wide, 3 squares tall
→ Area = 6 × 3 =
18 square cm
→ Perimeter = 2×(6+3) = 2×9 =
18 cm
Check: 6+6+3+3 = 18
✔
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Problem 6)
Rectangle: 8 squares wide, 2 squares tall
→ Area = 8 × 2 =
16 square cm
→ Perimeter = 2×(8+2) = 2×10 =
20 cm
Check: 8+8+2+2 = 20
✔
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Final Answer:
1) Area = 10 square cm, Perimeter = 14 cm
2) Area = 6 square cm, Perimeter = 14 cm
3) Area = 16 square cm, Perimeter = 16 cm
4) Area = 21 square cm, Perimeter = 20 cm
5) Area = 18 square cm, Perimeter = 18 cm
6) Area = 16 square cm, Perimeter = 20 cm
Parent Tip: Review the logic above to help your child master the concept of area and perimeter worksheet 3rd grade.
