Question

Triangle ABC
is reflected across the y
-axis to produce triangle DEF
. Which segment on DEF
is congruent to the segment BC
?

(1 point)
segment

Answer 1

When triangle ABC is reflected across the y-axis to produce triangle DEF, the segments in triangle DEF will correspond to the segments in triangle ABC based on their relative positions to the axis of reflection.

For a reflection across the y-axis:
- If point B is at (x, y), then its reflection, point D, will be at (-x, y).
- If point C is at (x, y), then its reflection, point E, will be at (-x, y).

Thus, segment BC in triangle ABC corresponds to segment DE in triangle DEF.

Therefore, the segment on DEF that is congruent to segment BC is:

**segment DE**.