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Measurement & Geometry

Grade 4 · Building confidence · 10 questions · Version PG-1C0CLP1-FMWM

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1.Classify a 50° angle.
2.Reflect (14, 6) across the vertical line x = 21.
3.Reflect (8, 4) across the vertical line x = 15.
4.Classify a 120° angle.
5.Reflect (6, 6) across the vertical line x = 13.
6.Classify a 20° angle.
7.Reflect (3, 6) across the vertical line x = 6.
8.Reflect (9, 8) across the vertical line x = 11.
9.Classify a 60° angle.
10.Reflect (17, 10) across the vertical line x = 24.

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 3
  1. Classify a 50° angle.Acute
  2. Reflect (14, 6) across the vertical line x = 21.(28, 6)
  3. Reflect (8, 4) across the vertical line x = 15.(22, 4)
  4. Classify a 120° angle.Obtuse
  5. Reflect (6, 6) across the vertical line x = 13.(20, 6)
  6. Classify a 20° angle.Acute
  7. Reflect (3, 6) across the vertical line x = 6.(9, 6)
  8. Reflect (9, 8) across the vertical line x = 11.(13, 8)
  9. Classify a 60° angle.Acute
  10. Reflect (17, 10) across the vertical line x = 24.(31, 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.