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This question says "The vertices of triangle ABC are A(-1,1), B(0,3), and C(3,4). Graph...
This question says "The vertices of triangle ABC are A(-1,1), B(0,3), and C(3,4). Graph the image of triangle ABC after a compositon of the following transformations in the order they were listed. Translation: (x,y) translates to (x-3, y-3) Reflection: in the line y=x
I understand how to do the translation but not the reflection.Thanks in advance!
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The vertices of triangle ABC are A(-1,1), B(0,3), and C(3,4). Reflection: in the line y=x
We need to find point A'(x,y) such that AA' the distance between A and A',perpendicularly bisected by line y=x.
Let AA' meets y=x at M ie. AM is perpendicular to y=x
Find equation of line AM, slope of AM is -1 (perpendicular to y=x ,its slope is 1) and posses through (-1,1)
y= x (ii) (given line)
find point of intersection of (i) and (ii) i.e (0,0),By mid point formula
(x-1)/2=0 , (y+1)/2=0
x=1 and y=-1
Thus coordinate of A'(1,-1)
Thus reflection of A(-1,1) with respect to line y=x is A'(1,-1).
similarly you can find B' and C'.
Posted by pramodpandey on May 14, 2013 at 9:46 AM (Answer #1)
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