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Grade 3 Mathematics Chapter 5 | Teacher Guide

Grade 3 Mathematics Chapter 5: Separate Teacher Guide and Answers

GRADE 3 MATH CHAPTER 5: Parent and Teacher Guide PDF | Student Text | Student Workbook. This is a separate subject resource in the developing full-year course. Keep completed student work private.

Parent reference. Chapter 5 addresses 2019 Alabama Mathematics, Grade 3: geometry and measurement. Answers to open tasks are indicative; evaluate evidence and reasoning rather than requiring identical wording.

Day 1 Answer Key: Describe Polygons

  1. 1. A closed straight-sided figure
  2. 2. No
  3. 3. 3
  4. 4. 4
  5. 5. Triangle with three unequal sides
  6. 6. No, open
  7. 7. 5
  8. 8. Rectangle or square
  9. 9. No, not all sides equal
  10. 10. Side and angle properties unchanged
  11. 11. Valid non-rectangular quadrilateral
  12. 12. Trapezoid under inclusive/exclusive definition, specify convention

Check for genuine independent understanding. For open tasks, require appropriate evidence. Reteach with an unfamiliar example and assess again.

Day 2 Answer Key: Sort Quadrilaterals

  1. 1. Four right angles
  2. 2. Four equal sides
  3. 3. Yes
  4. 4. Yes
  5. 5. No
  6. 6. Correct drawing
  7. 7. Rectangle with unequal adjacent lengths
  8. 8. Rotation alone changes neither angles nor sides
  9. 9. Opposite sides parallel and equal; opposite angles equal
  10. 10. Square and rhombus
  11. 11. Nested definitions
  12. 12. Opposite sides parallel

Check for genuine independent understanding. For open tasks, require appropriate evidence. Reteach with an unfamiliar example and assess again.

Day 3 Answer Key: Perimeter Problem Solving

  1. 1. 20 cm
  2. 2. 30 m
  3. 3. 32 cm
  4. 4. 4 cm
  5. 5. 14 m
  6. 6. 21 cm
  7. 7. 22 ft
  8. 8. Linear units
  9. 9. Any side pair summing 12
  10. 10. Area 60 square units, perimeter 32 units
  11. 11. 10×6 measures area
  12. 12. For example 10×5 and 9×6

Check for genuine independent understanding. For open tasks, require appropriate evidence. Reteach with an unfamiliar example and assess again.

Day 4 Answer Key: Area with Arrays

  1. 1. 36 square units
  2. 2. 36 square units
  3. 3. 49 square units
  4. 4. 8
  5. 5. 15 squares
  6. 6. Yes, 24
  7. 7. No: 20 and 22
  8. 8. 60
  9. 9. Square units
  10. 10. Repeated equal rows and columns
  11. 11. 33 square units
  12. 12. For example 4×6 and 3×7, both perimeter 20, areas 24 and 21

Check for genuine independent understanding. For open tasks, require appropriate evidence. Reteach with an unfamiliar example and assess again.

Day 5 Answer Key: Geometry and Measurement Assessment

  1. 1. 6
  2. 2. Yes
  3. 3. No
  4. 4. 30 units
  5. 5. 44 square units
  6. 6. 9
  7. 7. 81 square units
  8. 8. 9
  9. 9. Both 32 square units
  10. 10. 24 versus 36
  11. 11. Distance around versus surface covered
  12. 12. (1,8),(2,7),(3,6),(4,5)

Check for genuine independent understanding. For open tasks, require appropriate evidence. Reteach with an unfamiliar example and assess again.

Assessment and Progress Record

Suggested indicators: accurate concept, independent explanation, vocabulary or procedural fluency, and transfer to an unfamiliar example. This chapter alone does not establish year-level mastery. Record results privately.