Year 5

# Exploring missing lines of symmetry following a reflection

Year 5

# Exploring missing lines of symmetry following a reflection

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## Lesson details

### Key learning points

- In this lesson, we will investigate a variety of shapes which have already been reflected and find where the missing line of symmetry would be.

### Licence

This content is made available by Oak National Academy Limited and its partners and licensed under Oak’s terms & conditions (Collection 1), except where otherwise stated.

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### 5 Questions

Q1.

Which of the following statements is NOT correct?

The x axis can be a line of reflection

The y axis can be a line of reflection

When shapes are reflected some of the coordinates can change

Q2.

If we are reflecting a shape onto the x axis then which of the following is correct?

Both the x and y coordinates of the reflected shapes must change

Both the x and y coordinates of the reflected shapes must stay the same

The y coordinate will definitely stay the same

Q3.

If we are reflecting a shape onto the y axis then which of the following statements is correct?

Both the x and y coordinates of the reflected shapes must change

Both the x and y coordinates of the reflected shapes must stay the same

The x coordinate will definitely stay the same

Q4.

A triangle with the coordinates (-5,6), (-5,7) and (-4,7) is reflected by a line of reflection along the y axis, which of the below are the correct reflected coordinates?

(-5,-5) (-7,7) (-4,-4)

(-5,-6), (-5,-7) (-4,-7)

(5,-6) (5,-7) (4,-7)

Q5.

A point with coordinates (-4,0) is reflected by a line of reflection along the x axis, what would its new reflected coordinates be?

(-4,-1)

(-4,1)

(4,0)

### 5 Questions

Q1.

Which of the below mean the same as a line of reflection?

Straight line

Unequal line

Wiggly line

Q2.

If the distance between point A and its reflected point (A') is 12 squares then which of the statements below is true?

The distance between the mirror line and A is 12 squares

The distance between the mirror line and A is 24 squares

The distance between the mirror line and A' is also 12 squares

Q3.

If distance between point B and a mirror line is 9 squares, then which of the following statements below is true?

The distance between B and B' is 4.5 squares

The distance between B and B' is also 9 squares

The distance between the mirror line and B' is 4.5 squares

Q4.

The coordinates (-4,-4) and (-4,-2) are reflected, after reflection (-4,-4) becomes (3,3) and (-4,-2) becomes (1,3), which of the following statements is true?

The line of reflection is vertical

The x axis is the line of reflection

The y axis is the line of reflection

Q5.

A point with coordinates (1,-4) and (1,-3) are reflected to become (-3,-4) and (-3,-3) what do we know about the mirror line?

It is a diagonal line

It is a horizontal line

We do not have enough information