Perimeter of Rectangle Shapes: A table displaying five examples with length, breadth, and perimeter values for calculating rectangle perimeters.

Let’s solve each row one by one. We know the formula for the perimeter of a rectangle is:

Perimeter = 2 × (Length + Breadth)

We can rearrange this to find missing values:

- If we have Length and Perimeter, we can find Breadth:
→ Breadth = (Perimeter ÷ 2) – Length

- If we have Breadth and Perimeter, we can find Length:
→ Length = (Perimeter ÷ 2) – Breadth

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(i) Length = 22 mm, Perimeter = 60 mm → Find Breadth

Step 1: Divide perimeter by 2 → 60 ÷ 2 = 30
Step 2: Subtract length → 30 – 22 = 8 mm

✔ Breadth = 8 mm

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(ii) Length = 16 m, Perimeter = 58 m → Find Breadth

Step 1: 58 ÷ 2 = 29
Step 2: 29 – 16 = 13 m

✔ Breadth = 13 m

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(iii) Breadth = 75 cm, Perimeter = 200 cm → Find Length

Step 1: 200 ÷ 2 = 100
Step 2: 100 – 75 = 25 cm

✔ Length = 25 cm

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(iv) Breadth = 8 km, Perimeter = 40 km → Find Length

Step 1: 40 ÷ 2 = 20
Step 2: 20 – 8 = 12 km

✔ Length = 12 km

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(v) Length = 20 cm, Perimeter = 50 cm → Find Breadth

Step 1: 50 ÷ 2 = 25
Step 2: 25 – 20 = 5 cm

✔ Breadth = 5 cm

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Final Answer:
(i) 8 mm
(ii) 13 m
(iii) 25 cm
(iv) 12 km
(v) 5 cm