Hello my wonderful Grade 5 superstar! 👋
I'm Kashef and today we're learning how to find the Perimeter of Polygons! Perimeter is the total distance around the outside of a shape. For any polygon, just add up all the side lengths. Ready to walk around shapes? Let’s go! 🚀
🧠 What is Perimeter?
Perimeter = Sum of all sides
Each side 5 cm → Perimeter = 5 + 5 + 5 + 5 = 20 cm
⭐ Regular Polygons (Easy Rule)
If all sides are equal: Perimeter = Side Length × Number of Sides
- Square (4 sides): 6 cm × 4 = 24 cm
- Equilateral Triangle (3 sides): 8 cm × 3 = 24 cm
- Regular Pentagon (5 sides): 4 cm × 5 = 20 cm
🎯 Let’s Find Perimeters!
1. A rectangle has sides 12 cm, 7 cm, 12 cm, 7 cm. What is the perimeter?
2. A triangle has sides 9 cm, 9 cm, 9 cm. What is the perimeter?
3. An irregular quadrilateral has sides 5 cm, 8 cm, 6 cm, 11 cm. What is the perimeter?
🌍 Perimeter in Real Life
🏠 Fencing around a garden
🖼️ Framing a picture
🏃 Running around a soccer field
🎀 Ribbon needed to go around a gift
🧪 Quick Perimeter Quiz
Question: A square with 9 cm sides has a perimeter of...
You are a Perimeter Expert! 🎉🥳
Kashef is super proud of you! You can now find the perimeter of any polygon.
Perimeter helps us measure fences, frames, and paths — you're doing amazing!