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JSS2: MATHEMATICS - 2ND TERM

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  1. Transactions in the Homes and Offices
    8 Topics
    |
    1 Quiz
  2. Expansion and Factorization of Algebraic Expressions
    4 Topics
    |
    1 Quiz
  3. Algebraic Expansion and Factorization of Algebraic Expression
    4 Topics
    |
    1 Quiz
  4. Algebraic Fractions I
    4 Topics
    |
    1 Quiz
  5. Addition and Subtraction of Algebraic Fractions
    2 Topics
    |
    1 Quiz
  6. Solving Simple Equations
    4 Topics
    |
    1 Quiz
  7. Linear Inequalities I
    4 Topics
    |
    1 Quiz
  8. Linear Inequalities II
    2 Topics
    |
    1 Quiz
  9. Quadrilaterals
    2 Topics
    |
    1 Quiz
  10. Angles in a Polygon
    4 Topics
    |
    1 Quiz
  11. The Cartesian Plane Co-ordinate System I
    3 Topics
    |
    1 Quiz
  12. The Cartesian Plane Co-ordinate System II
    1 Topic
    |
    1 Quiz
  • excellence
Lesson 10, Topic 1
In Progress

Angles between Lines and Triangles

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Topic Content:

  • Angles between Lines and Triangles
    • Angles on a Straight Line
    • Complementary Angles
    • Supplementary Angles
    • Vertically Opposite Angles
    • Angles at a Point
    • Angles in Parallel Lines
    • Angles in Triangles

1. Angles on a Straight Line:

cover course page204
Sum of angles on a straight line is 180°

In the diagram above

⇒ \( \scriptsize \hat{AOB} \:+\: \hat{BOC} \: + \: \hat{COD} = 180^o\)

That is, a + b + c = 180°

2. Complementary Angles:

cover course page205
Complementary angles are 
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