Question

Right AABC has coordinates A(-7, 3), B(-7, 10), and C(-1,3). The triangle is reflected

over the x-axis and then reflected again over the y-axis to create AA'B'C'. Which are
the coordinates of vertex A?

Answer 1

A'(7, - 3 )

Explanation:

Under a reflection in the x- axis

a point (x, y ) → (x, - y ), thus

A(- 7, 3 ) → (- 7, - 3 )

Under a reflection in the y- axis

a point (x, y ) → (- x, y ), thus

(- 7, - 3 ) → A'(7, - 3 )