Tahmina
help with transformation
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Tahmina
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muhammad9t5
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let me see your file.
harsimran_hs4
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about the line y = x
because two of the coordinates lie on the line itself and other two are mirror images of each other about the line y = x
Tahmina
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okay
Tahmina
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what does that mean?
muhammad9t5
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i think D.
Tahmina
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im thinking d too
muhammad9t5
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yes because it will rotate due same points on x-axis.
harsimran_hs4
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well D won`t work because rotation by 180 would result in reflection about y axis
Tahmina
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then whats the answer?
terenzreignz
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No it doesn't, @harsimran_hs4
Consider rotating the line y=x 180 degrees wrt the origin, you don't get the line y = -x
Tahmina
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im thinking d makes sense
Tahmina
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well does it?
terenzreignz
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I vote yes :)
harsimran_hs4
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well then tell me what is the reflection of point (-3,1) about line y = x ?
Tahmina
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ill notify you if you are correct or not okay?
terenzreignz
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Easier to see that the reflection of the point (3,2) about the line y=x is (2,3) which is not on the parallelogram.
harsimran_hs4
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well point is (-3, 1) not (3, 2) i am considering
terenzreignz
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Well, now that you mention it, the image is (1,-3)
harsimran_hs4
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(-3, -3) and (3,3) lie on the line so after reflection they will also lie on the line and remain where they were and (-3, 1) and (3, -1) interchange their position
terenzreignz
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But if it's to be the reflection with respect to the line y=x, then the image of each and every point must still be on the parallelogram, and the image of (-3,1), which is (1,-3) is not on the parallelogram.
harsimran_hs4
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agreed
my bad!! but how does d come out to be the solution?
terenzreignz
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Because A, B, and C were wrong? lol
harsimran_hs4
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LOL!! expected some good arguments tough
terenzreignz
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I'm really not good at explaining geometric concepts, these things just come to me sorta instinctively :(
harsimran_hs4
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cool got hold of it ......
FINALLY I AGREE D IS RIGHT!!