MathIsimple
Lesson 5-2: Perimeter Calculation

Perimeter Calculation

Learn to calculate perimeter of rectangles, squares, and other shapes through interactive activities and real-world applications.

45 minutesPerimeter CalculationGarden FenceReal-World Applications
Learning Scenario: Garden Fence Planning

The Challenge:

You want to build a fence around your rectangular garden. The garden is 8 feet long and 6 feet wide. How much fencing do you need to go all the way around the garden?

Garden Fence Challenge

Perimeter Calculation:

Garden: 8 ft long × 6 ft wide
Perimeter = 2 × (length + width)
P = 2 × (8 + 6) = 2 × 14 = 28 feet
You need 28 feet of fencing

Learning Activities

Master perimeter calculation through interactive activities and real-world scenarios

Knowledge Points Display
Activity 1
Learn perimeter calculation with our friendly math teacher. Master perimeter formulas through interactive demonstrations.

Key Features:

  • Interactive shape models
  • Step-by-step perimeter calculation process
  • Visual perimeter strategies
  • Progress tracking with milestones

Skills You'll Learn:

  • Perimeter = sum of all sides
  • Rectangle: P = 2 × (length + width)
  • Square: P = 4 × side
  • Measure and calculate perimeters
Interactive Practice
Activity 2
Practice perimeter calculation through garden fence scenarios. Learn to calculate perimeter for different shapes.

Key Features:

  • Garden fence simulation
  • Interactive perimeter calculation
  • Visual measurement guidance
  • Real-world applications

Skills You'll Learn:

  • Garden: 8 ft × 6 ft = 28 ft perimeter
  • Square flower bed: 4 ft × 4 ft = 16 ft perimeter
  • Rectangular pool: 12 ft × 8 ft = 40 ft perimeter
  • Use virtual ruler to measure sides
Examples Library
Activity 3
Explore various perimeter calculation examples with different shapes and practice problems.

Key Features:

  • Multiple shape types
  • Different calculation strategies
  • Step-by-step solutions
  • Interactive practice problems

Examples:

  • Rectangle: 5 ft × 3 ft = 16 ft perimeter
  • Square: 4 ft × 4 ft = 16 ft perimeter
  • Rectangle: 8 ft × 6 ft = 28 ft perimeter
  • Square: 6 ft × 6 ft = 24 ft perimeter
Perimeter Calculation Guide

What is Perimeter?

Distance around a shape

The total length of all sides

Add all sides

Perimeter = side1 + side2 + side3 + side4

Measured in units

Feet, inches, meters, centimeters

Perimeter Formulas:

Rectangle

P = 2 × (length + width)

Example: 5 ft × 3 ft = 16 ft

Square

P = 4 × side

Example: 4 ft × 4 ft = 16 ft

Triangle

P = side1 + side2 + side3

Example: 3 ft + 4 ft + 5 ft = 12 ft

Practice Examples

Garden Fence Problems:

8 ft × 6 ft = 28 ft perimeter

4 ft × 4 ft = 16 ft perimeter

12 ft × 8 ft = 40 ft perimeter

6 ft × 6 ft = 24 ft perimeter

Perimeter Calculations:

Rectangle: 5 ft × 3 ft = 16 ft

Square: 4 ft × 4 ft = 16 ft

Rectangle: 8 ft × 6 ft = 28 ft

Square: 6 ft × 6 ft = 24 ft

Ready for the next lesson?

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