1.2.6 Task - Symmetry

Reflection symmetry

- if the design were reflected across the line of symmetry, the image would be exactly the same as the original design

Multiple Select

Which type of triangles have reflection symmetry?

• Scalene Triangle

• Equilateral Triangle

• Isosceles Right Triangle

• Isosceles Triangle

• Scalene Right Triangle

Draw

Circle the quadrilaterals (4 sided shapes) with reflection symmetry

Draw

Circle the figures on your resource page have more than three lines of symmetry

Multiple Choice

Tell if the figure has a line of symmetry or not.

• YES

• NO

Multiple Choice

Tell if the figure has a line of symmetry or not.

• YES

• NO

Multiple Choice

Tell if the figure has a line of symmetry or not.

• YES

• NO

On the next page see if the figure can be rotated onto itself.

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Multiple Choice

Did it have rotational symmetry?

• yes

• no

Open Ended

Jessica claims that she can rotate all figures in such a way that they will not change.  How does she do it? 

Since all figures can be rotated 360º without change, that is not a very special quality.  However, the shape in part (a) above was special because it could be rotated less than 360º and still remain unchanged.  A shape with this quality is said to have rotation symmetry. 

Draw

Circle the shapes that have rotational symmetry

Draw

Circle the shapes on the resource page that have 90º rotation symmetry?  That is, which can be rotated about a point 90º and remain unchanged?

Multiple Choice

Determine whether the figure has line symmetry, rotational symmetry, both, or neither.

• Rotational

• Reflectional

• Both

• Neither

Multiple Choice

What is the angle of rotational symmetry?

• 360°
• 180°
• 120°
• 90°

Poll

Can a figure have translation symmetry? (That is, slide onto itself?)

• yes

• no