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Measurement & Geometry

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

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1.Classify a 140° angle.
2.Reflect (16, 6) across the vertical line x = 22.
3.Reflect (10, 1) across the vertical line x = 16.
4.Classify a 40° angle.
5.Reflect (7, 3) across the vertical line x = 13.
6.Classify a 170° angle.
7.Reflect (1, 15) across the vertical line x = 3.
8.Reflect (7, 1) across the vertical line x = 12.
9.Classify a 50° angle.
10.Reflect (3, 3) across the vertical line x = 9.

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 140° angle.Obtuse
  2. Reflect (16, 6) across the vertical line x = 22.(28, 6)
  3. Reflect (10, 1) across the vertical line x = 16.(22, 1)
  4. Classify a 40° angle.Acute
  5. Reflect (7, 3) across the vertical line x = 13.(19, 3)
  6. Classify a 170° angle.Obtuse
  7. Reflect (1, 15) across the vertical line x = 3.(5, 15)
  8. Reflect (7, 1) across the vertical line x = 12.(17, 1)
  9. Classify a 50° angle.Acute
  10. Reflect (3, 3) across the vertical line x = 9.(15, 3)

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.