Maharashtra Board Textbook Solutions for Standard Four

Part Two

Lesson 12 – Perimeter and Area

Exercise

1. Find the perimeter of the figures given below.

(1)

IMG 20230912 230844 Part Two – Lesson 12 – Perimeter and Area

Ans:

Perimeter = 4 + 1 + 4 + 1

∴ Perimeter = 10 cm

(2)

IMG 20230912 230914 Part Two – Lesson 12 – Perimeter and Area

Ans:

Perimeter = 3 + 3 + 3 + 3

∴ Perimeter = 12 cm

(3)

IMG 20230912 230943 Part Two – Lesson 12 – Perimeter and Area

Ans:

Perimeter = 3 + 4 + 5

∴ Perimeter = 12 cm

(4)

IMG 20230912 231014 Part Two – Lesson 12 – Perimeter and Area

Ans:

Perimeter = 2 + 7 + 2 + 7

∴ Perimeter = 18 cm

(5)

IMG 20230912 231042 Part Two – Lesson 12 – Perimeter and Area

Ans:

Perimeter = 3 + 4 + 3 + 4

∴ Perimeter = 14 cm

2. The sides of a rectangular field are 150m, 120m, 150m and 120m. Find the perimeter of the field.

Ans:
Perimeter of the field = 150 + 120 + 150 + 120
∴ Perimeter of the field = 540 cm

 

Perimeter of the rectangular field is 540 cm

Exercise

Find the area of the following figures (all small squares are of 1 sq cm area).

(1) 

IMG 20230912 231635 Part Two – Lesson 12 – Perimeter and Area

Ans:

Area of identity card = number of squares

∴ Area of identity card = 6 + 6 + 6 + 6

∴ Area of identity card = 24 sq. cm

(2) 

IMG 20230912 231650 Part Two – Lesson 12 – Perimeter and Area

Ans:

Area of shape = number of squares

∴ Area of shape = 2 + 2

∴ Area of shape = 8 sq. cm

(3) 

IMG 20230912 234026 Part Two – Lesson 12 – Perimeter and Area

Ans:

Area of shape = number of squares

∴ Area of shape = 4 + 4 + 4 + 4

∴ Area of shape = 16 sq. cm

(4) 

IMG 20230912 234034 Part Two – Lesson 12 – Perimeter and Area

Ans:

Area of shape = number of squares

∴ Area of identity card = 7 sq. cm