GEOMETRY SLIDESHOW 2:.

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Presentation transcript:

GEOMETRY SLIDESHOW 2:

CONGRUENT Figures are the same SIZE and SHAPE NOT Congruent NOT Congruent not same size not same shape

Which figures are congruent?

A and G D and I E and J C and H Did you get the following pairs? A and G D and I E and J C and H Remember: Shapes can be congruent even if one of them has been rotated (as in A and G) or reflected (as in C and H).

SIMILAR Figures have the same shape, but not size.

SIMILAR Figures have the same shape, but not size.

MOTIONS: There are 3 different ways to move a plane figure: *SLIDE *FLIP *TURN

*SLIDE – Translation *FLIP – Reflection *TURN - Rotation

SLIDE: TRANSLATION Moves a figure in a straight direction

FLIP: REFLECTION gives a mirror image of a figure

TURN: ROTATION moves a figure about a point

A slide or translation…

A slide or translation… moves a figure in a straight direction L L

A flip or reflection…

A flip or reflection… gives a figure its mirror image L L

A turn or rotation…

A turn or rotation… moves a figure about a point L L

SYMMETRY A rectangle is a symmetric figure because it can be folded into 2 congruent halves that fit on top of each other. Each of your folds lie along a line of symmetry. The rectangle has two lines of symmetry.

SYMMETRY This W has only one line of symmetry.