Question

What are the coordinates of A'B'C' if triangle ABC is rotated 180 degrees about the origin?

2
1
A = (1, 0)
2 3
4
5
6
7
8
9
10
-2 -1 0
-1
-2
-3
4
B = (1, -4)
C = (8,-4)
--6

Answer 1

the coordinates of A(x, y) will be map to A'(-x, -y). a rotation of 180° negates, or changes the sign of, both the x- and y-coordinates