An irregular parallelogram rotates 360° about the midpoint of its diagonal. How many times does the image of the parallelogram coincide with its preimage during the rotation?
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OpenStudy (lizett22):
its preimage during the rotation?
2
4
6
8
OpenStudy (eyust707):
|dw:1395268499045:dw|
OpenStudy (eyust707):
|dw:1395268524590:dw|If you rotate it about that point how many times would it line up with the original image?
OpenStudy (eyust707):
You rotate a full time around (360 degrees)
OpenStudy (lizett22):
2?
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OpenStudy (eyust707):
yep
OpenStudy (lizett22):
your awesome :D can you help me with more ? :( its plato
OpenStudy (eyust707):
sure
OpenStudy (lizett22):
Which transformation will always map a parallelogram onto itself?
OpenStudy (lizett22):
a 90° rotation about its center
a reflection across one of its diagonals
a 180° rotation about its center
a reflection across a line joining the midpoints of opposite sides
Done
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OpenStudy (eyust707):
|dw:1395268801874:dw|Heres a parallelogram. Try some of those on this. Which ones definately do not work?
OpenStudy (lizett22):
d?
OpenStudy (lizett22):
? :(
OpenStudy (lizett22):
@dreamer02 ΔABC is translated 6 units up and 3 units left to create ΔA′B′C′. If vertex A is located at (-1, 2), what are the coordinates of A′ ?
A(5, -1)
B(-4, 8)
C(2, -4)
D(-7, -1)
OpenStudy (anonymous):
B
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OpenStudy (lizett22):
OpenStudy (lizett22):
thanks it was right :)
OpenStudy (anonymous):
The third one (0.5)
OpenStudy (lizett22):
ΔXYZ is translated 4 units up and 3 units left to yield ΔX′Y′Z′. What is the distance between any two corresponding points on ΔXYZ and ΔX′Y′Z′ ?
25 units
7 units
5 units
7√ units
OpenStudy (anonymous):
last one
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OpenStudy (anonymous):
noo
OpenStudy (anonymous):
second, sorry
OpenStudy (lizett22):
ah i got it wrong :(
OpenStudy (lizett22):
iclicked the last answer lol its okay :/
OpenStudy (anonymous):
sorry...
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OpenStudy (lizett22):
lol sorry its just i can only get one wrong
OpenStudy (lizett22):
OpenStudy (lizett22):
@dreamer02
OpenStudy (anonymous):
ah, for that i have no idea :/
OpenStudy (lizett22):
i guess right lol it was A :D what about this one
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OpenStudy (lizett22):
AB¯¯¯¯¯ is congruent to CD¯¯¯¯¯. Point P is the midpoint of AB¯¯¯¯¯, and point Q is the midpoint of CD¯¯¯¯¯. Which relationship must be true?
AC¯¯¯¯¯≅PQ¯¯¯¯¯
BC¯¯¯¯¯≅CQ¯¯¯¯¯
PB¯¯¯¯¯≅CD¯¯¯¯¯
AP¯¯¯¯¯≅DQ¯¯¯¯¯
Done
OpenStudy (lizett22):
OpenStudy (lizett22):
@dreamer02
OpenStudy (lizett22):
@dreamer02 ? :(
OpenStudy (lizett22):
i already have that answer i need a new one :)
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OpenStudy (lizett22):
OpenStudy (anonymous):
seems like the final one?
OpenStudy (anonymous):
for the previous question
OpenStudy (lizett22):
wait what ? O.o
OpenStudy (anonymous):
for the last question, what is the figure?
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