Hi! I'm Vidi. Let's learn Perimeter & Area together — read with me, then play the games to win a ⭐!
🔵Perimeter
Perimeter is the total distance around the edge of a shape. Add the lengths of all the sides.
- Rectangle: P = 2 × (length + width).
- Square: P = 4 × side.
Perimeter is measured in units of length (cm, m).
👀 See a worked example
Find the perimeter of a 5 cm × 3 cm rectangle.
2 × (5 + 3) = 16 cm.
Find the perimeter of a square with side 6 cm.
4 × 6 = 24 cm.
🤖 Vidi's Key Points
- Perimeter = distance around a shape; add all sides.
- Rectangle: 2 × (length + width). Square: 4 × side.
- Perimeter is measured in length units (cm, m).
🟢Area
Area is the amount of surface a shape covers, measured in square units (cm², m²).
- Rectangle: A = length × width.
- Square: A = side × side.
For a composite shape, split it into rectangles, find each area, and add them.
👀 See a worked example
Find the area of a 5 cm × 3 cm rectangle.
5 × 3 = 15 cm².
Find the area of a square with side 4 cm.
4 × 4 = 16 cm².
🤖 Vidi's Key Points
- Area = surface covered, in square units (cm², m²).
- Rectangle: length × width. Square: side × side.
- Composite shapes: split into rectangles and add the areas.
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