Page 239 - NUMINO TG_3A

15Unit Fold in Half

jOb ective Find a symmetrical shape.

1. Textbook Instructions UNIT

Show students the process of how to make a 15 Fold in Half
symmetrical shape using a piece of paper and
a pair of scissors. (The teacher must prepare Fold a piece of colored paper in half. Cut out the shape.
the following things in advance: a piece of Then unfold.
paper, scissors, and pen.)
(As you are folding a piece of paper...) A heart is made.
First, you must fold the square piece of
paper in half. Next, draw the shape. Draw the cut-out shapes in the blanks.
(The teacher must also draw the shape. )

(As you are cutting out the shape...) Follow
the line and cut out the shape. What kind
of shape do you get?
(As you are unfolding the piece of paper...)
You get the shape of a heart.
(As you are showing students the shape of
a heart...) Compare the shape on the left
and the shape on the right. How do they
look? They look the same.

You can use the method above to make a
shape, which you can fold to have the two
sides completely overlap each other.
Imagine what the remaining two shapes
would look like when unfolded and draw
the shapes.

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2. Build Understanding

Line Symmetry and Point Symmetry Example: Shapes with a line symmetry
There are 2 types of symmetry:
Line Symmetry and Point Symmetry. line of symmetry

A Line Symmetry has an axis of symmetry, where
the shape on one side must look like a reflected
image on a mirror.

222 NUMINO Teacher s Guide