Lesson+2+by+Kajal

Mr Radonich came outside with a ruler =D He used the ruler as a mirror line, Mr Radonich was the object and Lindsay was the reflection of him. They did a few movements showing rotation, translation and reflection. Mr Radonich then introduced us to 'invariant points'.

Everyone went back in class and wrote all the words we just used in the lesson 'starter'.

REFLECTION: The mirror line- The line that we reflect. Invariant points- These are on the mirror line. Invariant properties- Shape, size Object- The thing we reflect Image- The thing we get after the reflection

All the groups then got together to practice their dance that had to include 'rotation, translation and reflection'. Our group had 3 people in it so we used two mirror lines and one person was in the middle. We had a piece of paper that showed the communication.

We all came back inside and Mr Radonich called Jarick up to the class and demonstrated in front the class what you needed to clarify when you use rotation in your dance.

Mr Radonich wrote them on the board.

ROTATION: Defined- "where he is rotating around" --> center of rotation. Direction- (anti-clockwise is the default) -What angle What changes under rotation: position Invariant properties- Doesn't change, size, distance from centre of rotation, shape Invariant Point: centre of rotation

Then we defined a little bit of Translation:

TRANSLATION:- SLIDE [how far across, how far up (down)] INVARIANT PROPERTIES: size, shape