Right Angles & Turns
Identify right angles; recognise that two right angles make a half-turn, three make three-quarters, and four make a complete turn
Lesson
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Use a square corner and quarter-turns to compare angles.
Before teaching
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1 approach
Use a square corner and quarter-turns to compare angles.
Use a square corner and quarter-turns to compare angles.
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Learning resources
Extra practice links — they do not replace Gakuva’s teaching approach.
Illustrative Mathematics · Practice link — not the full lesson
Are these right?
Before you open · source notes
Angles in figures are judged as right angles or not. Supports right angles and turns, not every degree measure.
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Before you openAsk which angles are right angles and how the learner can tell.
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Source, access and review notes
Public Illustrative Mathematics task page. The .html address responds HTTP 308 to this URL. An anonymous GET of this URL on 2026-11-12 returned HTTP 200 with no login or payment prompt. Where a teacher solution is present, it is on the same page as the student task; this check did not find a separate locked student view. An adult can use the student view section and should not read a solution aloud. Advertising was not observed in the fetched HTML text; that is not a browser, device, or ad-free guarantee. This is a paper or discussion task, not an automatically marked interactive game. Opening the link does not save practice or assess mastery. Diagrams on the page use missing or filename-only alt text, so they are not an accessible image equivalent. Accessibility still depends on an adult describing the picture.
Illustrative Mathematics. “Are these right?.” Licensed CC BY-NC-SA 4.0. External task; Gakuva does not copy, host, embed, or redistribute it.
CC BY-NC-SA 4.0 — link only
Check understanding
- Use a right-angle checker to identify right angles in shapes and the environment
- Classify angles as right angles, less than a right angle, or greater than a right angle
- Explain that 4 right angles make a full turn (360°)
“If your child looks at the corner of a piece of paper, can they tell you that's a right angle — and that spinning all the way round takes four right angles?”
Curriculum record
- Type
- Conceptual
- Subject
- Mathematics
- Domain
- Geometry
- Age range
- Ages 7–10
Standards