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Outline

  1. Two-Dimensional Shapes and Their Attributes
    1. Lines and Line Segments
    2. Polygons
    3. Angles
    4. Triangles
    5. Quadrilaterals

    Two-Dimensional Shapes and Their Attributes

    Author:Lillian Petersen
    Two-Dimensional Shapes and Their Attributes

    Table of Contents

    • Lines and Line Segments

      • Explore Parallel Lines
      • Exploring Perpendicular Lines
      • Creating Lines
    • Polygons

      • Geoboard Polygons
      • Concave/Convex
    • Angles

      • How to Construct an Angle
      • Looking at Angles
      • Animated Acute Angles
      • Animated View of Obtuse Angles.
      • Types of Angles
    • Triangles

      • Triangle Lengths Exploration
      • Triangle Classification Challenge
      • Triangle Classification Examples
      • Triangle with Sides and Angles
    • Quadrilaterals

      • Quadrilaterals
      • Classifying Quadrilaterals
    Next
    Explore Parallel Lines

    New Resources

    • Slope Between 2 Points (Phase 2)
    • Regular Star Polygons
    • Focus and Directrix
    • Regular Polygons and Equivalent Triangles
    • Sum of Squares: Proof without Words

    Discover Resources

    • circles
    • cross-curve
    • Algebra of Plane Vectors
    • Special Right Triangles
    • Vector equation of line
    • Hole 7

    Discover Topics

    • Derivative
    • Straight Lines
    • Linear Equations
    • Centroid or Barycenter
    • Random Variables
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