Find the perimeter of the following shapes.

Five geometric shapes (rectangles and squares) with labeled dimensions in centimeters, asking to find the perimeter of each.

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Show Answer Key & Explanations Step-by-step solution for: CBSE Class 4 Maths Perimeter and Area Question Bank

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To find the perimeter of each shape, we use the formula for the perimeter of a rectangle, which is:

\[
\text{Perimeter} = 2 \times (\text{Length} + \text{Width})
\]

Let's solve each part step by step.

---

Part (a)

- Length = 6 cm
- Width = 4 cm

\[
\text{Perimeter} = 2 \times (6 + 4) = 2 \times 10 = 20 \, \text{cm}
\]

---

Part (b)

- Length = 5 cm
- Width = 4 cm

\[
\text{Perimeter} = 2 \times (5 + 4) = 2 \times 9 = 18 \, \text{cm}
\]

---

Part (c)

- Length = 8 cm
- Width = 6 cm

\[
\text{Perimeter} = 2 \times (8 + 6) = 2 \times 14 = 28 \, \text{cm}
\]

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Part (d)

- Length = 5 cm
- Width = 1 cm

\[
\text{Perimeter} = 2 \times (5 + 1) = 2 \times 6 = 12 \, \text{cm}
\]

---

Part (e)

- Length = 10 cm
- Width = 2 cm

\[
\text{Perimeter} = 2 \times (10 + 2) = 2 \times 12 = 24 \, \text{cm}
\]

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Final Answers

\[
\boxed{20, 18, 28, 12, 24}
\]

Parent Tip: Review the logic above to help your child master the concept of perimeter worksheet for grade 4.

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