AI generatedGeometry and measuresKey Stage 3

Describing a reflection

Describing a reflection.

  • Match corresponding vertices before describing a transformation.
  • Reflection: mirror line. Rotation: centre, angle and direction. Translation: vector.
  • Enlargement: centre and scale factor. Apply combined transformations in the stated order.

Example 1

Describe the single transformation from ABC to A′B′C′.

Black: original. Blue: image.−6−4−224−22468100ABCA′B′C′
Black: original. Blue: image.
Reflection in .

Corresponding points are equally far from the mirror line on opposite sides. State the mirror line, not just “reflection”.

Example 2

Describe the single transformation from ABC to A′B′C′.

Black: original. Blue: image.−22468−6−4−2240ABCA′B′C′
Black: original. Blue: image.
Reflection in .

Corresponding points are equally far from the mirror line on opposite sides. State the mirror line, not just “reflection”.

Your turn

Question 1

Describe the single transformation from ABC to A′B′C′.

Black: original. Blue: image.−8−6−4−2246−224681012140ABCA′B′C′
Black: original. Blue: image.
Check answer
Reflection in .

Corresponding points are equally far from the mirror line on opposite sides. State the mirror line, not just “reflection”.

Question 2

Describe the single transformation from ABC to A′B′C′.

Black: original. Blue: image.−2246810−6−4−2240ABCA′B′C′
Black: original. Blue: image.
Check answer
Reflection in .

Corresponding points are equally far from the mirror line on opposite sides. State the mirror line, not just “reflection”.

Question 3

Describe the single transformation from ABC to A′B′C′.

Black: original. Blue: image.−8−6−4−2246−2246810120ABCA′B′C′
Black: original. Blue: image.
Check answer
Reflection in .

Corresponding points are equally far from the mirror line on opposite sides. State the mirror line, not just “reflection”.

Question 4

Describe the single transformation from ABC to A′B′C′.

Black: original. Blue: image.−2246810−6−4−2240ABCA′B′C′
Black: original. Blue: image.
Check answer
Reflection in .

Corresponding points are equally far from the mirror line on opposite sides. State the mirror line, not just “reflection”.

Question 5

Describe the single transformation from ABC to A′B′C′.

Black: original. Blue: image.−4−224−224680ABCA′B′C′
Black: original. Blue: image.
Check answer
Reflection in .

Corresponding points are equally far from the mirror line on opposite sides. State the mirror line, not just “reflection”.

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