Shape Patterns and Symmetry

🎯 What Will We Learn Today?

Shapes can make beautiful patterns and some shapes are perfectly balanced! Today we'll explore shape patterns and the magic of symmetry.

📚 What Are Shape Patterns?

A shape pattern repeats shapes in a predictable order. Once you find the core（the part that repeats）, you can predict what comes next!

`
🔵🔴🔵🔴🔵🔴🔵🔴 → Core: 🔵🔴（repeating）
⭐🔺🔺⭐🔺🔺⭐🔺🔺 → Core: ⭐🔺🔺（repeating）
`

🔍 How to Find the Pattern

Look at the first few shapes

Find where they start repeating

That repeating part is the pattern core

Use the core to predict what comes next!

🎮 What Comes Next?

`
🔺🔵🔺🔵🔺🔵🔺 ___ ___
Answer: 🔵🔺（the pattern is 🔺🔵）

🟡🟡🔴🟡🟡🔴🟡🟡 ___ ___
Answer: 🔴🟡（the pattern is 🟡🟡🔴）
`

📐 What Is Symmetry?

Symmetry means a shape looks exactly the same on both sides when you fold it along a line. The fold line is called the line of symmetry.

Shapes with Symmetry:

Square: 4 lines of symmetry!

Rectangle: 2 lines of symmetry

Equilateral triangle: 3 lines of symmetry

Circle: Infinite lines of symmetry!

Heart: 1 line of symmetry（down the middle）

No Symmetry:

A scalene triangle（all sides different）

Most letters like F, G, J, L, P, Q, R

🎨 Symmetry All Around Us

Butterfly wings — perfectly symmetrical

Human face — roughly symmetrical left and right

Leaves — many have a central line of symmetry

Buildings — architects love symmetry!

📝 Practice Problems

What comes next? 🔴🔴🔵🔴🔴🔵🔴 ___ ___

Does a rectangle have lines of symmetry? How many?

Which letter has symmetry: A, F, or M?

Draw a shape that has NO symmetry.

Find three things in your room that show symmetry.

🎮 Play a Game!

Practice patterns with Swimming Otters!