Posted by Sam on .
The coordinates of the vertices of triangle ABC are A (5,1), B (2,3) and C (4,7). The triangle is reflected over the line x=2. What is the sum of the xcoordinates of points A', B' and C'(the points after the reflection)?

Math 
Reiny,
The y values will not change,
the new x value will be 2 + (2oldx)
eg A(5,1) will become A'(2+(2+5),1) or A'(9,1)
Find B' and C', then add up the xcoordinates.