Posted by **Sam** on Wednesday, December 19, 2007 at 9:50pm.

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 x-coordinates of points A', B' and C'(the points after the reflection)?

- Math -
**Reiny**, Wednesday, December 19, 2007 at 11:32pm
The y values will not change,

the new x value will be 2 + (2-oldx)

eg A(-5,1) will become A'(2+(2+5),1) or A'(9,1)

Find B' and C', then add up the x-coordinates.

## Answer this Question

## Related Questions

- geometry - The coordinates of the vertices of triangle CDE are C(1,4), D(3,6), ...
- math - Triangle ABC below is reflected across the y-axis and then translated 1 ...
- Math - The coordinates of the vertices of CDE are C(1, 4), D(3, 6), and E(7, 4...
- math - triangle ABC, with vertices A(2,3), B(4,-4), C(6,8), is reflected across ...
- geometry - The coordinates of the vertices of CDE are C(1, 4), D(3, 6), and E(7...
- Geometry - The coordinates of the vertices of CDE are C(1, 4), D(3, 6), and E(7...
- 6th grade math - The vertices of triangle ABC are a(8,23) B(2,2) C(2,8). What ...
- 1 geometry question - The coordinates of the vertices of CDE are C(1, 4), D(3, 6...
- Help with triangle - I need help with these: Triangle LMN has vertices L(-6,5), ...
- Math - ∆ABChas vertices A(–1, –2), B(–4, –4), and C(–3, –5). Graph ∆...