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Year 7 - Maths

Describing a rotation's direction and size

Transformations

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 understand the size and direction of rotation.

Key Notes

  • Rotations can be either clockwise or anti-clockwise.
  • The size of the rotation is given in degrees.

Vocabulary To Learn

  • Clockwise: Clockwise is the direction that the hands of an analogue clock travel.
  • Anti-clockwise: Anti-clockwise is the opposite direction to which the hands of an analogue clock travel.
  • Degrees: The most common unit of measurement for angle. One whole turn is equal to 360 degrees, written 360°.

Common Mistakes To Avoid

  • "Right means clockwise" and "left means anti-clockwise"

3 Quick Questions (With Answers)

1. Solve this in steps: explain the method from this lesson and why each step matters.

Rotations can be either clockwise or anti-clockwise. The size of the rotation is given in degrees.

2. Use this key word in a maths sentence and explain it clearly. 'Clockwise'

Clockwise is the direction that 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: "Right means clockwise" and "left means anti-clockwise". Correction: This is only true when referencing the top of the object being rotated. Rotating "left" and "right" is incorrect for all other vertices.

More Lessons In This Unit

Browse all guides in the Year 7 Maths guide library.