symmetry rotation translation reflection. symmetry
TRANSCRIPT
To be a line of symmetry, the shape must have two halves that match exactly.
When you trace a heart onto a piece of folded paper, and then cut it out, the two half hearts make a whole heart. The two halves are symmetrical.
You can look to see if your name has symmetrical letters in it too!
A B C D E FG H I J K L M N O P Q R S T U V W X Y Z
Infinite number
ROTATIONIf a shape spins
180, how far does it spin?
180
Rotating a shape 180 turns a shape upside
down.
ROTATIONDescribe how the triangle A was transformed to
make triangle B
A B
Describe the translation.Triangle A was rotated right 90Triangle A was rotated right 90
ROTATIONDescribe how the arrow A was transformed to make
arrow B
Describe the translation.Arrow A was rotated right 180 Arrow A was rotated right 180
A
B
• In geometry, a transformation is a way to change the position of a figure.
• With translation all points of a figure move the same distance and the same direction.
• A TRANSLATION IS A CHANGE IN LOCATION.
TRANSLATIONIn the example below triangle A is translated to
become triangle B.
A B
Describe the translation.Triangle A is slide directly to the right.Triangle A is slide directly to the right.
TRANSLATIONIn the example below arrow A is translated to
become arrow B.
Describe the translation.Arrow A is slide down and to the right.Arrow A is slide down and to the right.
A
B
REFLECTIONAL SYMMETRYThe line created by the fold is the line of symmetry.
A shape can have more than one line of symmetry.
Where is the line of symmetry for this shape?
How can I fold this shape so
that it matches exactly?
Line of Symmetry