Question

reflecting a figure over the y - axis changes the sign of its coordinates. translating a figure involves moving it without changing its or shape. to determine if two triangles are congruent, both their corresponding side lengths and must be the same. transformations like translations, rotations, and reflections can be used to confirm the of geometric figures.

Explanation:

1. When reflecting over the y - axis, the x - coordinates change sign.
2. Translation moves a figure without changing size or shape.
3. For triangle congruence, side - lengths and angle measures must match.
4. Transformations help confirm congruence of geometric figures.

Answer:

1. x
2. size
3. angle measures
4. congruence