Question

Find the coordinates of the image of point R(3, -5) rotated 180 about the origin.

I think the answer is (-5,-3)

Answer 1

Does a equilateral triangle shape have rotational symmetry?

I pretty sure the answer is yes

Answer 2

rotation through 180° changes both signs. So, (3,-5) -> (-3,5)

Did you actually plot your solution? You would see that it was nowhere near the rotated point.

an equilateral triangle has axial and rotational symmetry.

Answer 3

(-24,-15)