Perimeter, area and volumes: changes in scale

Learning Objectives Identify the outside edge of a shape as its perimeter. Describe the inside space of a shape as its area. Explain that volume is the space something takes up. Predict if a shape will get bigger or smaller when its scale changes. Count blocks to see how area changes when a shape gets bigger. Make a good guess (probability) about which box can hold more toys. What if your favorite teddy bear 🧸 suddenly grew twice as big? Would it still fit in your toy box? 🤔 Today, we will learn about making shapes bigger and smaller! We will see how the edges and space inside change. This helps us make good guesses about where things can fit. Real-World Applications Choosing the right size box for a present 🎁 Knowing if a big cookie has more chocolate chips 🍪 B...

TermDefinitionExample PerimeterPerimeter is the walk all the way around the outside of a shape. It is like a fence. 🚶‍♀️If a square garden has 4 sides, the perimeter is the fence going around all 4 sides. AreaArea is the flat space inside a shape. It is like a carpet that covers the floor. 🟧The area of your bedroom is all the floor space where you can play with your toys. VolumeVolume is how much space something can hold inside. It is like filling a cup with juice. 🧃The volume of a toy box is all the space inside for your toys. Scale UpTo scale up means to make something bigger in a special way. Every part gets bigger. ✨A baby picture of you is smaller. A school picture of you now is scaled up! Scale DownTo scale down means to make something smaller in a special way. Every part gets s...

The Growing Edge Pattern Side Length \times 2 \rightarrow Perimeter \times 2 When we make the side of a square twice as long, the walk around it (perimeter) also gets twice as long. The Super Space Pattern Side Length \times 2 \rightarrow Area \times 4 When we make the side of a square twice as long, the space inside (area) gets four times bigger! It's super space!