Question

which best explains why all equilateral triangles are similar?all equilateral triangles can be mapped onto each other using dilations.all equilateral triangles can be mapped onto each other using rigid transformations.all equilateral triangles can be mapped onto each other using combinations of dilations and rigid transformations.all equilateral triangles are congruent and therefore similar, with side lengths in a 1:1 ratio.

Explanation:

Similar figures can be mapped to each other via dilations (to scale) and rigid transformations (to align position/rotation). Rigid transformations alone only create congruent (not all similar) triangles, dilations alone may not align orientation, and not all equilateral triangles are congruent (they can have different side lengths).

Answer:

All equilateral triangles can be mapped onto each other using combinations of dilations and rigid transformations.