To rotate a figure 180 degrees about the origin, which of the following must happen?
Select one:
a. Switch the coordinates and multiply both by –1
b. Multiply both coordinates of each point by –1
c. Switch the coordinates and multiply the first coordinate by –1
d. Multiply the first coordinate by –1

Question

To rotate a figure 180 degrees about the origin, which of the following must happen?
Select one:
a. Switch the coordinates and multiply both by –1
b. Multiply both coordinates of each point by –1
c. Switch the coordinates and multiply the first coordinate by –1
d. Multiply the first coordinate by –1

acxbox22 · Answer

The general rule for a rotation by 180° about the origin is (A,B)  (-A, -B)