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TRANSFORMATIONS ยท LESSON 12

Transformations Mixed Review

Combine coordinate rules, drawing, matrices and complete descriptions.

โฑ๏ธ 38โ€“48 min ๐Ÿ“˜ Review ๐Ÿ“ Coordinate diagrams included

Mixed Review

  1. Translate (โˆ’2,4) by (5,โˆ’3).
  2. Reflect (3,โˆ’7) in the x-axis.
  3. Reflect (โˆ’2,5) in y=x.
  4. Rotate (4,1) 90ยฐ anticlockwise about origin.
  5. Enlarge (โˆ’3,2) by scale factor โˆ’2 about origin.
  6. Identify matrix โˆ’1001.
  7. Apply 0โˆ’110 to (2,6).
  8. Apply horizontal shear factor 3 to (1,2).
  9. State the invariant line of an x-direction stretch.
  10. Explain why a rotation description needs three pieces of information.

โœ… Check Your Work

Show answers and working
  1. (3,1).
  2. (3,7).
  3. (5,โˆ’2).
  4. (โˆ’1,4).
  5. (6,โˆ’4).
  6. Reflection in the y-axis.
  7. (โˆ’6,2), a 90ยฐ anticlockwise rotation.
  8. (1+3ร—2,2)=(7,2).
  9. The y-axis.
  10. Centre, angle and direction are all required to determine one unique rotation.

๐Ÿง  Learn It Visually: Mixed Review Strategy

Mixed questions test recognition before calculation. Start by comparing size, orientation, parallelism and distances.

Same orientation and size

Often a translation or rotation.

Reversed orientation

Often a reflection or a transformation involving a negative determinant.

Changed size or shape

Consider enlargement, stretch or shear.

๐ŸŽฏ Identify the Transformation

Study the object and image, then choose the most complete description.

ObjectImage
Look at size, orientation and corresponding movements.
Think Like a Mathematician: What is the smallest set of clues needed to distinguish translation, reflection and rotation?

๐Ÿงท Remember

Recognition is only the first step; your final description must be complete.

โš ๏ธ Common Mistake

Naming the type correctly but omitting the vector, line, centre, angle or factor.

๐ŸŽฏ Exam Tip

Use one pair of corresponding vertices to test your suspected rule before committing.

Revision Guidance and Readiness