Grade 8 Measurement and Geometry

📋 Course Outline

1. Measurement Units and Examples
2. Unit Conversion Rules
3. Perimeter of Shapes
4. Area of Two-Dimensional Shapes
5. Similar Shapes
6. Congruent Shapes

📖 1. Measurement Units and Examples

🔑 Key Concepts & Definitions

• Length: measures distance and uses millimetres (mm), centimetres (cm), metres (m), and kilometres (km).
• Mass: uses milligrams (mg), grams (g), and kilograms (kg).
• Capacity: measures how much a container can hold and uses millilitres (mL) and litres (L).

📝 Essential Points

• Time is measured in seconds, minutes, and hours.

• Examples of measurements are:

  • 3 m for length
  • 2,5 kg for mass
  • 750 mL for capacity
  • 45 minutes for time

💡 Memory Hook

L-M-C-T: length, mass, capacity, time

📖 2. Unit Conversion Rules

★ Must-know

📌 When converting from a big unit to a small unit, multiply; when converting from a small unit to a big unit, divide.

• The length conversion relationships are:
  • 1 km = 1 000 m
  • 1 m = 100 cm
  • 1 cm = 10 mm

Further detail

• The mass conversion relationships are 1 kg = 1 000 g and 1 g = 1 000 mg.

• The capacity conversion relationship is 1 L = 1 000 mL.