Question

Learning task 1: Find the perimeter and area of each figure?
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Answer 1

Perimeter of :-

1.  22cm

2. 20m

3. 44m

Area of :-

1.  24 cm square

2.  25 cm square

3.  72 cm square

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Answer 2

1. Perimeter = 22 cm, Area = 24 cm²

2. Perimeter = 20 m, Area = 25 m²

3. Perimeter = 44 m, Area = 72 m²

Given data:

1. A rectangle with dimensions 3 cm and 8 cm

2. A square with sides 5 m each

3. A rectangle with dimensions 4 m and 18 m

To find:

The perimeter and area of given shapes

Concept:

• For a rectangle,

1. perimeter = 2 (length + width)
2. area = length × width

• For a square

1. perimeter = 4 × length of a side
2. area = (side)²

Step-by-step explanation:

1.

Perimeter = 2 (length + width)

= 2 (8 + 3) cm

= 2 × 11 cm

= 22 cm

Area = length × width

= 3 × 8 cm²

= 24 cm²

2.

Perimeter = 4 × length of a side

= 4 × 5 m

= 20 m

Area = (side)²

= (5)² m²

= 25 m²

3.

Perimeter = 2 (length + width)

= 2 (18 + 4) m

= 2 × 22 m

= 44 m

Area = length × width

= 18 × 4 m²

= 72 m²

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