objectives: find co-ordinates of points determined by geometric information. understand and use the...

Objectives:

• Find co-ordinates of points determined by geometric information.

• Understand and use the language and notation of reflections.

• Recognise transformation and symmetry of a 2-D shape: reflection in given mirror lines and line symmetry.

Vocabulary:

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Rhombus?

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Move one square only: horizontal line of symmetry

Move one square only:Vertical line of symmetry

Move one square only:

diagonal, vertical and horizontal lines of symmetry

Move one square only:

no lines of symmetry

Add two more squares to make the red line a line of symmetry:

Add two more squares to make the red line a line of symmetry:

A B

C

D

E F

Which triangles are reflections of triangle A?

A B

C

D

E F

B is a reflection of A

A B

C

D

E F

C is not a reflection of A

It is a rotation of A

A B

C

D

E F

D is a reflection of A

A B

C

D

E F

E is not a reflection of A.

It is a translation (slide).

A B

C

D

E F

F is a reflection of A

A B

C

D

E F

Are any of the other triangles reflections of each other?

D is reflection of E ( or vice versa)

Thank you for your attention