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OpenStudy (anonymous):
jimthompson5910 (jim_thompson5910):
what is the distance from R to U
OpenStudy (anonymous):
2units
jimthompson5910 (jim_thompson5910):
So the distance from B to C must also be 2 units
point C is 2 units below point B, so point C is at _____
jimthompson5910 (jim_thompson5910):
you can see this is if you slide rectangle RSTU over to where A and B are
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OpenStudy (anonymous):
c is 1,1
jimthompson5910 (jim_thompson5910):
correct
jimthompson5910 (jim_thompson5910):
D is found in much the same way
OpenStudy (anonymous):
jimthompson5910 (jim_thompson5910):
pick two points, say A and A' and try to figure out how to translate A to A'
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OpenStudy (anonymous):
so is the first choice correct then?
jimthompson5910 (jim_thompson5910):
you got it, hopefully you see why it's A?
OpenStudy (anonymous):
yeah i just did what you said, can you help with one more?
jimthompson5910 (jim_thompson5910):
alright great, sure I can do one more
OpenStudy (anonymous):
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jimthompson5910 (jim_thompson5910):
what did you get
OpenStudy (anonymous):
i dont really get this one
jimthompson5910 (jim_thompson5910):
if you reflected the point T over some line to get T'
what line would have to reflect T over?
OpenStudy (anonymous):
y?
jimthompson5910 (jim_thompson5910):
is the line of reflection horizontal, vertical, or diagonal
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OpenStudy (anonymous):
y=x?
jimthompson5910 (jim_thompson5910):
where is the mirror line? is this line horizontal or vertical?
OpenStudy (anonymous):
vertical
jimthompson5910 (jim_thompson5910):
so it's going to look like this form x = h
where h is any number
jimthompson5910 (jim_thompson5910):
if h = 1, then x = 1 is a vertical line that cuts through 1 on the x axis
if h = 0, then x = 0 is a vertical line that cuts through 0 on the x axis ... and this line overlaps the y axis perfectly
etc etc
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jimthompson5910 (jim_thompson5910):
so this is why the answer is x = 0
if you reflect T over the vertical line x = 0, then you will get T'