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Grade 4 · lesson 1 of 4

Connect Degrees with Fractions of a Full Turn

Use the supplied full-turn fraction or subdivision.

About 20 minutes, plus any extended practice

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Supplied materials

  • Paper and a pencil; drawing and spoken explanations are welcome. An adult may read directions and options aloud.
  • Supplied worked-case record: One eighth of a full turn is 360÷8=45°.
  • All quantities and shape descriptions are supplied in the worked example and questions; no purchase or personal information is needed.

Learn the idea

A full turn has 360 degrees. A half turn is 180 and a quarter turn is 90. Angle measure counts turn about a shared endpoint, not the length of the rays. Extending a ray leaves its angle with the other ray unchanged.

Use the supplied full-turn fraction or subdivision. Divide 360 by the equal number of turn parts and multiply by the requested parts when needed. Check known benchmarks such as a half or quarter turn.

Use 360° as the full-turn benchmark. Angle size measures turning, not the drawn ray lengths. Draw one center and equally divided turn directions around it.

  1. Draw one center and equally divided turn directions around it.
  2. Follow the worked example. Point to each number or shape feature and say what it tells you.
  3. Use the supplied full-turn fraction or subdivision.
  4. Try the question and then the three practice questions. Check your answers and explain any change you make.
Worked example

See the method in action

One eighth of a full turn is 360÷8=45°. Two such eighth-turns make 90°, a quarter turn. Making the drawn rays longer does not change forty-five degrees, because the direction difference remains the same. Use 360° as the full-turn benchmark. Angle size measures turning, not the drawn ray lengths. Draw one center and equally divided turn directions around it.

Your turn

Check your reasoning

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Helpful tips
  • Use 360° as the full-turn benchmark.
  • Angle size measures turning, not the drawn ray lengths.
A full turn is split into 2 equal angle parts. How many degrees is one part?

Feedback appears here after you check. This is practice, not a graded school assessment.

See the answer and explanation

180

Divide the full 360-degree turn into equal parts. The result is 180.

Take it further

One sixth of a turn is 60°; three sixths make 180°.

Nothing here is saved to an account or sent to a teacher. The answer download includes your current choice and any checked feedback. It does not include choices from the separate More practice section. Download that section separately.

More practice: try new cases

Choose an answer for each problem. Explain your method on paper, then use the feedback to decide what to revisit.

More practice: try new cases
1. A full turn is split into 3 equal angle parts. How many degrees is one part?
Need a hint?
  • Use 360° as the full-turn benchmark.
  • Angle size measures turning, not the drawn ray lengths.
2. A full turn is split into 4 equal angle parts. How many degrees is one part?
Need a hint?
  • Use 360° as the full-turn benchmark.
  • Angle size measures turning, not the drawn ray lengths.
3. A full turn is split into 6 equal angle parts. How many degrees is one part?
Need a hint?
  • Use 360° as the full-turn benchmark.
  • Angle size measures turning, not the drawn ray lengths.

Your choices are temporary. Feedback appears after you check all the answers.

Nothing here is saved to an account or sent to a teacher. Keep your own notes or download them before leaving. The score describes these questions; it does not certify subject mastery.

Check the subject sources

These LifeStarter passages, scenarios and exercises are authored for this Academy with AI assistance and review. External resources keep their publishers’ terms. A grade label suggests a starting level; it does not establish alignment with your school’s complete requirements.