Question

△abc is rotated 90° clockwise around the origin to form △abc. which coordinate is the same as the x-coordinate of point a? x-coordinate of point a; y-coordinate of point a; opposite of x-coordinate of point a; opposite of y-coordinate of point a. (image: a coordinate grid with △abc and △abc, with a(-1,2), a(2,1), b, b, c, c plotted.)

Explanation:

Step1: Identify coordinates of A and A'

Point \( A \) has coordinates \( (-1, 2) \), so \( x_A = -1 \), \( y_A = 2 \). Point \( A' \) has coordinates \( (2, 1) \), so \( x_{A'} = 2 \).

Step2: Compare \( x_{A'} \) with options

• \( x_A = -1

eq 2 \)

• \( y_A = 2 \), which matches \( x_{A'} = 2 \)
• Opposite of \( x_A \) is \( 1

eq 2 \)

• Opposite of \( y_A \) is \( -2

eq 2 \)

Answer:

y - coordinate of point A