GRADE 4
Unit 9: Angles, Lines, and Shapes
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  • UNIT1Data About Us
  • UNIT2Geometric Investigations
  • UNIT3Products and Factors
  • UNIT4Numbers and Number Operations
  • UNIT5Using Data to Predict
  • UNIT6Place Value and Large Numbers
  • UNIT7Patterns in Multiplication
  • UNIT8Exploring Fractions
  • UNIT9Angles, Lines, and Shapes
  • UNIT10Using Decimals
  • UNIT11Multiplication with Larger Numbers
  • UNIT12Division
  • UNIT13Using Patterns
Unit Contents Games Math eTools Practice Glossary References

Unit 9 Contents

  • Angles, Lines, and Shapes367

    • LESSON 1
    • Investigating Angles368
      Kinds of Angles
      Homework
    • LESSON 2
    • Lines373
      TIMSville
      Line Segments and Rectangles
      Homework
    • LESSON 3
    • Turning Through Angles378
      Angles and Degrees
    • LESSON 4
    • Measuring and Estimating Angles384
      Estimating Angles
      Using a Protractor
      Drawing Angles
      Homework
    • LESSON 5
    • Angles in Polygons396
      What is a Polygon?
      Adding the Angles of a Triangle
      Homework
    • LESSON 6
    • Workshop: Angles and Lines405
      Geometry in Quilts
    • LESSON 7
    • Symmetry407
      Line Symmetry
      Are These Right?
      Turn Symmetry
    • LESSON 8
    • Slides, Flips, and Turns412
      Flips, Slides, and Turns of Shapes
      Congruence
      Homework
    • LESSON 9
    • Describing and Analyzing Shapes419
      Homework
    • LESSON 10
    • Classifying Shapes422
      Triangle Riddles
      Sorting Polygons
      Homework
    • LESSON 11
    • Workshop: Shapes and Properties425
      Describe and Analyze Shapes
      Slides, Flips, and Turns in Escher Drawings
      Journey to Flatopia
      Dimensions
      Journey to Flatopia
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Math Trailblazers > Grade 4 Student Guide > Unit 9 > Lesson 11 > Pages 430–445