To determine which transformations are needed to show that triangle ABC is congruent to triangle EFD (△ABC ≅ △EFD), we need to consider the possible transformations that can map one triangle onto the other. The key transformations that can create congruent figures are reflection, rotation, and translation. Dilation, however, changes the size of the figure and is not applicable for proving congruence since congruent triangles maintain the same size and shape.
Therefore, for showing that △ABC ≅ △EFD by mapping ABC onto EFD, the applicable transformations are:
- Reflection
- Rotation
- Translation
Dilation is not necessary since it alters the size of the triangle.
So, the correct transformations are:
- Reflection
- Rotation
- Translation
Please select those options.