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    • Year 7
      • 1 Numbers
        • 1.1 Number systems
        • 1.2 Place value
        • 1.3 Expanded notation
        • 1.4 Order of operations
        • 1.5 Number properties
        • 1.6 Distributive properties
      • 10 Area
      • 11 Angles
        • 11.1 Measuring angles
        • 11.2 Straight line angles
        • 11.3 Vertically opposite
        • 11.4 Parallel lines
        • 11.5 Alternate angles
      • 12 Types of triangles
        • 12.1 Triangles by angles
        • 12.2 Triangles by sides
      • 2 Algebra
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        • 2.3 Algebraic notation
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      • 4 Integers
      • 5 Solving equations
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        • 6.1 + – fractions
        • 6.2 * / fractions
      • 7 Percentages
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        • 8.3 Scientific notation
      • 9 Rational expressions
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          • 1.2.3 Equilateral, isosceles and scalene
          • 6.1 Area of triangles
        • 1.3 Angles
          • 1.3.1 Sum of angles
          • 1.3.2 Exterior angle
        • 1.4 Circles
        • 1.5 Measurement
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        • 2.3 Proportionality
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        • 4.2 Multiplying powers
      • 5 Integers
      • 6 Ratio
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      • 8 Statistics
        • 6.1 Table
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Home / Maths / Year 8 / 1 Geometry / 1.3 Angles

1.3 Angles

Introduction

Remember from year 7 the principles of:

  • Measuring angles
  • Angles on a straight line
  • Vertically opposite
  • Parallel lines and Corresponding angles
  • Alternate angles

In addition, you should be aware of co-interior angles. For example, in the angles:

Examples of co-interior angles are d and f, which add up to 180\textdegree.

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