Reflections - HiSet: High School Equivalency Test: Math
Card 0 of 5
What is the result of reflecting the point 
over the y-axis in the coordinate plane?
What is the result of reflecting the point
Reflecting a point
over the y-axis geometrically is the same as negating the x-coordinate of the ordered pair to obtain
.
Thus, since our initial point was
and we want to reflect it over the y-axis, we obtain the reflection by negating the first term of the ordered pair to get
.
Reflecting a point
over the y-axis geometrically is the same as negating the x-coordinate of the ordered pair to obtain
Thus, since our initial point was
and we want to reflect it over the y-axis, we obtain the reflection by negating the first term of the ordered pair to get
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How many lines of symmetry does the above figure have?
How many lines of symmetry does the above figure have?
A line of symmetry of a figure is about which the reflection of the figure is the figure itself. The diagram below shows the only line of symmetry of the figure.
The correct response is one.
A line of symmetry of a figure is about which the reflection of the figure is the figure itself. The diagram below shows the only line of symmetry of the figure.
The correct response is one.
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On the coordinate plane, the point 
is reflected about the 
-axis. The image is denoted 
. Give the distance 
.
On the coordinate plane, the point 
The reflection of the point at 
about the 
-axis is the point at 
; therefore, the image of is 
. Since these two points have the same 
-coordinate, the distance between them is the absolute value of the difference between their 
-coordinates:
The reflection of the point at 
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Consider regular Hexagon 
; let 
and 
be the midpoints of 
and 
. Reflect the hexagon about 
, then again about 
. With which of the following points does the image of 
under these reflections coincide?
Consider regular Hexagon 
Refer to the figure below, which shows the reflection of 
about 
; we will call this image 
.
Note that 
coincides with 
. Now, refer to the figure below, which shows the reflection of 
about 
; we will call this image - the final image - 
Note that 
coincides with 
, making this the correct response.
Refer to the figure below, which shows the reflection of 
Note that 
Note that 
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Consider regular Hexagon 
; let 
and 
be the midpoints of 
and 
. Reflect the hexagon about 
, then again about 
. Which of the following clockwise rotations about the center would result in each point being its own image under this series of transformations?
Consider regular Hexagon 
Refer to the figure below, which shows the reflection of the given hexagon about 
; we will call 
the image of 
, call 
the image of 
, and so forth.
Now, refer to the figure below, which shows the reflection of the image about 
; we will call 
the image of 
, call 
the image of 
, and so forth.
Note that the vertices coincide with those of the original hexagon, and that the images of the points are in the same clockwise order as the original points. Since 
coincides with 
, 
coincides with 
, and so forth, a clockwise rotation of five-sixth of a complete turn - that is, 
,
is required to make each point its own image under the three transformations.
Refer to the figure below, which shows the reflection of the given hexagon about 
Now, refer to the figure below, which shows the reflection of the image about 
Note that the vertices coincide with those of the original hexagon, and that the images of the points are in the same clockwise order as the original points. Since 
is required to make each point its own image under the three transformations.
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