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Measurement & Geometry

Grade 4 · On-level practice · 10 questions · Version PG-1BX5ZHH-CIW8

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1.Classify a 40° angle.
2.Reflect (8, 11) across the vertical line x = 10.
3.Classify a 80° angle.
4.Reflect (8, 8) across the vertical line x = 12.
5.Classify a 120° angle.
6.Reflect (14, 15) across the vertical line x = 18.
7.Classify a 130° angle.
8.Reflect (11, 5) across the vertical line x = 16.
9.Classify a 50° angle.
10.Reflect (7, 13) across the vertical line x = 11.

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 14
  1. Classify a 40° angle.Acute
  2. Reflect (8, 11) across the vertical line x = 10.(12, 11)
  3. Classify a 80° angle.Acute
  4. Reflect (8, 8) across the vertical line x = 12.(16, 8)
  5. Classify a 120° angle.Obtuse
  6. Reflect (14, 15) across the vertical line x = 18.(22, 15)
  7. Classify a 130° angle.Obtuse
  8. Reflect (11, 5) across the vertical line x = 16.(21, 5)
  9. Classify a 50° angle.Acute
  10. Reflect (7, 13) across the vertical line x = 11.(15, 13)

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.