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  1. Introduction to Deductive Geometry
    1. Theorems related to Parallel Lines
    2. Interior and Exterior Angles of Triangles

    Introduction to Deductive Geometry

    Author:Anthony OR 柯志明
    Topic:Geometry
    Introduction to Deductive Geometry

    Table of Contents

    • Theorems related to Parallel Lines

      • Angles related to parallel lines
      • Angles related to parallel lines (Converses)
      • Example 9.2
      • Example 9.3
    • Interior and Exterior Angles of Triangles

      • Angle Sum of Triangle
      • Exterior Angle of Triangle
      • Example 9.4
    Next
    Angles related to parallel lines

    New Resources

    • Assistants (custom GPTs or Gemini Gems) for Math
    • Parallel Lines and Angles: Thinking Classroom Exploration
    • 巧算長方形周界
    • Perimeter of a Rectangle with Unknown Sides
    • Tangent Plane to a Sphere

    Discover Resources

    • Angles of a Triangle
    • Explore Exterior Angles Sum
    • Eigenmann No. 176
    • Converting fractions to decimals
    • Length of an Arc

    Discover Topics

    • Boxplot
    • Hypergeometric Distribution
    • Curve Sketching
    • Frequency Distribution
    • Cube
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