Mathematics · Class 4
Fields and Fences
Learn Fields and Fences with notes, examples, and practice questions.
3 sections15–25 min read3 MCQs · 1 examples
Chapter Overview
Perimeter is found by adding every outside side length once.
Fields and Fences introduces perimeter as the distance around a closed shape. Learners calculate boundaries of rectangles, squares, and simple fields and connect perimeter with fencing and repeated addition.
Finding Perimeter
- Trace the complete outer boundary before adding.
- Rectangle perimeter = 2 × (length + breadth).
- Square perimeter = 4 × side.
- Use one common unit for all side lengths.
Fences and Missing Sides
- The amount of fencing needed usually equals the field's perimeter.
- A gate opening may be subtracted if it is not fenced.
- Opposite sides of a rectangle are equal.
- Different shapes can have the same perimeter.
Solved Examples
Step-by-step solutions — read each step before checking the final answer.
Fence a Field
A rectangular field is 18 m long and 12 m wide. How much fencing surrounds it?
- 1Add length and breadth: 18 + 12 = 30 m.
- 2There are two of each side.
- 3Multiply 30 × 2 = 60 m.
Answer
60 m of fencing
Key Points to Remember
- ✓ Perimeter measures a boundary
- ✓ Add all outer sides
- ✓ Rectangle perimeter is twice length plus breadth
- ✓ Square perimeter is four times its side
Exam Tips
- • Exclude internal lines from perimeter
- • Check whether a gate is included
- • Write the answer in length units, not square units
Practice MCQs — Fields and Fences
Test your understanding with topic-wise multiple choice questions. Explanations appear after each answer.
Question 1 of 3Score: 0/0
What is the perimeter of a square with side 7 cm?