Measurement

📏 Units of Measurement

🧠 Key Points

• ✅ There are two types of surface areas:
  • 🟩 Regular surface
  • 🌀 Irregular surface
• 📐 Area can be measured using:
  • 🧩 1 cm × 1 cm paper squares
  • 📊 Graph paper
• 📦 Volume of a hollow box is measured using 1 cm × 1 cm × 1 cm unit cubes.
• 💧 Volume of an irregular solid is measured by the water displacement method.
• 👁️ Read liquid volume at the level of the meniscus.
• 🎯 Accurate measurement helps us save materials and avoid wastage.

Area is the amount of surface, measured in cm², m², and km². Volume is the space inside, measured in mL, L, cm³, and m³.

Use squares or graph paper for area, unit cubes and water displacement for volume. Read liquids at the meniscus.

🔊 Voice