Mathematics for IGCSE & O level - Transformations (Section 4 - No. 10)
If an object is reflected across the line x = -3, and one vertex is at (1, 4), what are the new coordinates?
(-7, 4)
(1, -10)
(-1, 4)
(-4, 1)
Giải thích
x' = -3 - (1 -(-3)) = -3 - 4 = -7