Page 230 - NUMINO TG_3A

14Mirror Mirror on the Wall Unit

Material Mirror

2 . Place a mirror on the paper so that the given number of dots can be 2. Have students draw a line where the mirror
must be placed to show the given number of
seen. Draw an arrow to show the direction they are viewed. dots.

What you need: Mirror Guide them such they can be careful when
drawing the arrow. The number of dots that
a. b. appears will also depend on the direction of
the arrow.
2 4
Example:
c. d. 5 2a. The arrow points to

8 the right.
Number of dots: 2

2c. The arrow points
to the left.
Number of dot: 8

2d. When you place the mirror on top of a
dot, the dot on the paper and the image of
the dot on the mirror will combine to show
one dot.

14. Mirror Mirror on the Wall 133

Problem: Solution:
A mirror is placed along the line. The mirror image is When you place the mirror on top of a dot, the dot
reflected on the right side as indicated by the arrow. on the paper and the image of the dot on the mirror
What is the total number of dots you will see on the will combine to show one dot.
paper and on the mirror?
Answer: 9

3A Unit 14 213