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Measurement & Geometry

Grade 4 · Building confidence · 10 questions · Version PG-1BQD002-FMWM

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1.Classify a 90° angle.
2.Reflect (7, 1) across the vertical line x = 11.
3.Classify a 60° angle.
4.Reflect (20, 10) across the vertical line x = 23.
5.Reflect (12, 12) across the vertical line x = 18.
6.Classify a 80° angle.
7.Reflect (3, 11) across the vertical line x = 9.
8.Classify a 130° angle.
9.Reflect (14, 2) across the vertical line x = 19.
10.Classify a 100° angle.

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 2
  1. Classify a 90° angle.Right
  2. Reflect (7, 1) across the vertical line x = 11.(15, 1)
  3. Classify a 60° angle.Acute
  4. Reflect (20, 10) across the vertical line x = 23.(26, 10)
  5. Reflect (12, 12) across the vertical line x = 18.(24, 12)
  6. Classify a 80° angle.Acute
  7. Reflect (3, 11) across the vertical line x = 9.(15, 11)
  8. Classify a 130° angle.Obtuse
  9. Reflect (14, 2) across the vertical line x = 19.(24, 2)
  10. Classify a 100° angle.Obtuse

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.