Year 7 - Maths
Rotating objects
Transformations
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This pupil-friendly study guide includes a unit summary, clear notes, common mistakes, and quick questions with answers.
Unit Summary
This unit introduces pupils to shape tranformations: enlargements, rotations, reflections and translations both by hand and with technology.
Lesson Summary
You will learn to rotate objects using information about centre, size and direction of rotation.
Key Notes
- Tracing paper can be a helpful tool to perform a rotation.
- The image and the object should be congruent.
- Unless a full rotation occurs, the object and its image will not have the same orientation.
Vocabulary To Learn
- Clockwise: A clockwise direction is the direction in which the hands of an analogue clock travel.
- Anti-clockwise: An anti-clockwise direction is the opposite direction to which the hands of an analogue clock travel.
- Centre of rotation: The centre of rotation is the fixed point about which an object is rotated. It fixes the location of the image after it is rotated.
- Degrees: Degrees are the most common unit of measurement for angle. One whole turn is equal to 360 degrees, written 360°.
Common Mistakes To Avoid
- After drawing an object on the tracing paper, you take the tracing paper off the table to rotate it.
3 Quick Questions (With Answers)
1. Solve this in steps: explain the method from this lesson and why each step matters.
Tracing paper can be a helpful tool to perform a rotation. The image and the object should be congruent.
2. Use this key word in a maths sentence and explain it clearly. 'Clockwise'
A clockwise direction is the direction in which the hands of an analogue clock travel. Use this word when showing your method, then check your final answer is reasonable.
3. Spot and fix this common maths mistake.
Mistake: After drawing an object on the tracing paper, you take the tracing paper off the table to rotate it. Correction: This is especially dangerous if the centre of rotation wasn't drawn on the tracing paper, too. The image will lose its correct location.
More Lessons In This Unit
- Checking understanding of basic transformations Study Guide
- Describing a reflection Study Guide
- Describing a rotation's direction and size Study Guide
- Describing a translation Study Guide
- Describing an enlargement Study Guide
- Enlarging objects Study Guide
- Introduction to enlargements Study Guide
- Introduction to reflections Study Guide
- Introduction to rotations Study Guide
- Introduction to translation Study Guide
- Investigating transformations with Desmos Study Guide
- Investigating transformations with GeoGebra Study Guide
- Problem solving with transformations Study Guide
- Reflecting objects Study Guide
- Transformed objects Study Guide
- Translating objects Study Guide
- Understanding the centre of rotation Study Guide
Browse all guides in the Year 7 Maths guide library.