MIE Homework  Lines of Symmetry

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Slide 1  Symmetry

Slide 2  I can:Recognize a line of symmetry.Draw a line of symmetry.Identify lines of symmetry in two dimensional figures.Draw figures that have lines of symmetry.

Slide 3  What Is Symmetry?
 Symmetry is when an image can be folded along a line into two matching halves.
 An object or image is considered symmetrical when it can be folded into two matching halves such as the heart below.

Slide 4  Line of Symmetry
 The line that cuts an image exactly in half.
 horizontal, vertical, diagonal

Slide 5  For Example:
 A butterfly has symmetry.
 If you draw a line down the center of a butterfly, both sides are the same!

Slide 6  More Examples:
 Many kinds of food have symmetry!
 Many living things have symmetry!
 Even people have symmetry – most of the time!

Slide 7  Sometimes, even very complicated things have symmetry:

Slide 8  the same!
 The 2 sides are
 The 2 sides are
 symmetrical!

Slide 9  When the line of symmetry goes up and down,It is called VERTICAL symmetry

Slide 10  VERTICAL
 up and down

Slide 11  Another kind of symmetry is HORIZONTAL symmetry.
 Horizontal means across or side to side.

Slide 12
 For Example:
 Many common objects have horizontal symmetry!
 This bow and arrow has horizontal symmetry.!
 This ladybug has horizontal symmetry

Slide 13
 HORIZONTAL
 side to side

Slide 14  Sometimes, objects have both vertical and horizontal symmetry:
 vertical
 AND horizontal

Slide 15
 Can you see the symmetry in this pattern?
 This object has two lines of symmetry

Slide 16
 Which of these patterns is symmetrical?
 Nope!
 Nope!
 Yes!(one line of symmetry)

Slide 17
 This pattern is not symmetrical!
 Which of these patterns is NOT symmetrical?

Slide 18
 Does this object have vertical symmetry or horizontal symmetry?
 Both!
 In fact, you could argue that this object has 4 lines of symmetry! (although not exactly)

Slide 19  Use what you’ve learned about symmetry to answer the following practice questions.

Slide 20  On your sheet, draw all lines of symmetry.

Slide 21  On your sheet, draw all lines of symmetry.

Slide 22  On your sheet, draw all lines of symmetry.

Slide 23  Your turn!