Triangle ABC is reflected across the x -axis. If the coordinates of the original shape are A(−4,−1) , B(−5,−2) , and C(−10,−1) , what are the coordinates of A′ , B′ , and C′ ?

Question

A A′(4,−1), B′(5,−2), and C′(10,−1)
B A′(−4,1), B′(5,−2), and C′(−10,1)
C A′(4,1), B′(5,2), and C′(10,1)
D A′(−4,1), B′(−5,2), and C′(−10,1)

Answer 1

To reflect a point across the x-axis, we flip the sign of the y-coordinate.

Therefore, the coordinates of A' would be (−4, 1), B' would be (−5, 2), and C' would be (−10, 1).

The correct answer is option D.