### 4th Grade - Unit 12 Math

 Unit 12: Geometry and Measurement Text Mr. Yen's Videos Youtube Video Names and Links Page Chapter 25 - Plane Figures Location: Geometry Lesson 1 - Hands On: Points, Lines, and Line Segments 558 Points, Line Segments, and Lines Points, Line Segments, and Lines Lesson 2 - Rays and Angles 560 Naming Rays and Angles Naming Rays and Angles Lesson 3 - Polygons and Quadrilaterals 564 Classifying Angles Classifying Angles Lesson 4 - Classify Triangles 566 Polygons Polygons Lesson 5 - Circles 568 Quadrilaterals Quadrilaterals Lesson 6 - PS Field Trip: Adventure Playground 572 Classifying Triangles Classifying Triangles Chapter Review / Test 576 Circles Chapter 26 - Congruence and Symmetry Location: Geometry Lesson 1 - Line Symmetry 580 Lesson 2 - Line or Bilateral Symmetry 582 Lesson 3 - Rotational Symmetry 584 Lesson 4 - Congruent Figures 588 Lesson 5 - PS Strategy: Patterns in the Coordinate Grid 592 Chapter Review / Test 596 Chapter 27 - Perimeter and Area Location: Measurement Lesson 1 - Hands On: Model Perimeter and Area 600 Lesson 2 - Use Formulas for Perimeter 602 Area of Rectangles and Squares Lesson 3 - Use Formulas for Area 604 Perimeter of Complex Figures Lesson 4a - Perimeter and Area of Complex FiguresLesson 4b 608 Area of Complex Figures Lesson 5 - Problem Solving Strategy: Use Formulas 614 Chapter Review / Test 616 Chapter 28 - Solid Figures Location: Geometry Lesson 1 - Hands On: Use Nets o Build Solid Figures 620 Lesson 2 - Solid Figures 622 Lesson 3 - Surface Area 626 Lesson 4 - Volume 628 Lesson 5 - Problem Solving Plan: Surface Area or Volume 632 Chapter Review / Test 636