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Measurement & Geometry

Grade 4 · Stretch challenge · 10 questions · Version PG-147VEZC-5HDI

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1.Classify a 40° angle.
2.Reflect (0, 1) across the vertical line x = 7.
3.Classify a 60° angle.
4.Reflect (13, 2) across the vertical line x = 20.
5.Classify a 130° angle.
6.Reflect (9, 15) across the vertical line x = 16.
7.Classify a 70° angle.
8.Reflect (5, 7) across the vertical line x = 11.
9.Classify a 30° angle.
10.Reflect (20, 10) across the vertical line x = 27.

Answers and teaching notes

Use the answers to check the work after the learner finishes. For writing prompts, the guide describes what a strong response should include.

Show answers for version 20
  1. Classify a 40° angle.Acute
  2. Reflect (0, 1) across the vertical line x = 7.(14, 1)
  3. Classify a 60° angle.Acute
  4. Reflect (13, 2) across the vertical line x = 20.(27, 2)
  5. Classify a 130° angle.Obtuse
  6. Reflect (9, 15) across the vertical line x = 16.(23, 15)
  7. Classify a 70° angle.Acute
  8. Reflect (5, 7) across the vertical line x = 11.(17, 7)
  9. Classify a 30° angle.Acute
  10. Reflect (20, 10) across the vertical line x = 27.(34, 10)

Worked example

Sketch and label the quantities before selecting a measurement or geometry operation.

Common mistake

Using the right numbers with the wrong unit or formula.

Helpful hint

Write the unit beside every measurement.