Page 64 - NUMINO Challenge_B1
P. 64
Basic Concepts Reflections in the Mirror
When an image is reflected by a mirror, it appears to be B B
reversed from left to right. Therefore, a figure that is
flipped over looks the same as its mirror image. Mirror
When a mirror is placed on a paper figure, the reflection
in the mirror differs depending on the position of the mirror and the
direction it is viewed from.
Mirror Mirror Mirror Figure
Figure Figure Figure Mirror
Example If figure A below is reflected in a mirror, which of , , , ,
and cannot be formed by combining the figure with its mirror
image?
Figure A
Class Notes
When figure A is folded in half, the figure and its mirror image should overlap completely.
The folded line indicates where the is placed.
Draw a dotted line on each figure below to show where it should be folded in order for
the figure and its mirror image to overlap completely:
The mirror image of figure is not a part of figure A. Therefore, cannot be
formed by combining figure A with its mirror image.
61Geometry
When an image is reflected by a mirror, it appears to be B B
reversed from left to right. Therefore, a figure that is
flipped over looks the same as its mirror image. Mirror
When a mirror is placed on a paper figure, the reflection
in the mirror differs depending on the position of the mirror and the
direction it is viewed from.
Mirror Mirror Mirror Figure
Figure Figure Figure Mirror
Example If figure A below is reflected in a mirror, which of , , , ,
and cannot be formed by combining the figure with its mirror
image?
Figure A
Class Notes
When figure A is folded in half, the figure and its mirror image should overlap completely.
The folded line indicates where the is placed.
Draw a dotted line on each figure below to show where it should be folded in order for
the figure and its mirror image to overlap completely:
The mirror image of figure is not a part of figure A. Therefore, cannot be
formed by combining figure A with its mirror image.
61Geometry
