Question

which of the following explains why all circles are similar? all circles are polygons, and therefore all circles have the same shape. all circles have the same diameter, and therefore have the same shape. all circles have the same shape but different radii. all circles have the same radii but different shapes.

Explanation:

Similar shapes have the same shape but may differ in size. Circles are defined by a constant shape (round, with all points equidistant from the center) and can have different radii (sizes), meeting similarity criteria.

Answer:

All circles have the same shape but different radii.