Introduction to reflections | Maths | Quizalize & Oak National Academy

Starter quiz

When a vertex is labelled M $^{\prime}$ , it means the __________ of M.

object

sense

centre of rotation

image ✓

line of reflection
Which point on the image is corresponding to vertex A on the object?

b

c ✓

d
A transformation is a process that may change the size, orientation, or __________ of a shape.

'position' ✓
In which of these images is the orientation invariant when compared to its object?

image 1

image 2

image 3 ✓

image 4
In which of these images has the direction of the orientation reversed when compared to its object - where the direction of ABCD on the object is clockwise?

image 1

image 2 ✓

image 3

image 4
Which property may not be invariant when an object is rotated?

length of a side

size of an angle

position ✓

orientation ✓

sense

Which of these sentences uses the word "sense" correctly?

The sense of a word stays the same after translation because I can still read it ✓

The sense of a word changes after rotation because it is harder to read

The sense of a word changes if its letters look they've been written backwards ✓

The sense of a word stays the same after reflection because I can figure it out
In which of these images has the sense changed compared to the object?

image 1 ✓

image 2

image 3

image 4 ✓

image 5
Which of these transformations change sense?

translation

rotation

reflection ✓

enlargement
Complete this sentence: "When an object is reflected, the lengths of its sides are invariant. This means the lengths of the sides remain _______ ."

'the same' ✓
Which of these diagrams shows a reflection?
Which of these images is a reflection of its object?

image 1 ✓

image 2 ✓

image 3

image 4

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Just because the sense has changed, it doesn't mean a reflection has occurred.

If an image has a different sense to its object, there has definitely been a reflection - the line of reflection may be at an obscure angle.

Reflection - A reflection of a shape is the mirror image of the shape. An object is reflected when it is flipped over a fixed line.
Sense - The sense of an object is the direction of the orientation of the object.