1
Perimeter
Perimeter is the distance around a shape. Add up all the sides.
Square 4 cm: 4+4+4+4 = 16 cm
Geometry
📖 Study · Geometry (Grade 4)
Geometry (Grade 4)
We measure shapes — perimeter, area, faces, edges and vertices of 3D shapes.
🎯 What you'll learn
- ✓Find perimeter and area of rectangles
- ✓Count faces, edges, vertices of 3D shapes
- ✓Know regular vs irregular shapes
2
Area
Area is the space inside a shape. For a rectangle: length × width.
3 × 4 = 12 cm²
3
3D shapes
A cube has 6 faces, 12 edges, 8 vertices. A cylinder has 2 flat circles and a curved side.
🎲 cube ⚽ sphere 🥫 cylinder
4
Regular & irregular
A regular shape has all sides and angles equal. Otherwise it's irregular.
Regular: 🟥 Irregular: random rectangle