Question

which image is a reflection of the black polygon in quadrant i?
options:
the black polygon in quadrant i
the blue polygon in quadrant iii
the red polygon in quadrant ii
the green polygon in quadrant iv

Explanation:

A reflection over the y-axis flips a shape across the vertical y-axis, swapping its left-right orientation while keeping the top-bottom orientation the same. The black polygon in Quadrant I has its indentation on the right side; the red polygon in Quadrant II has its indentation on the left side, matching the left-right flip of a y-axis reflection, and maintains the same vertical positioning (positive y-values) as the original.

Answer:

the red polygon in quadrant II