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 shape but different radii.

All circles have the same radii but different shapes.

All circles have the same diameter, and therefore have the same shape.

Answer 1

Do these two circles have the same radii?

Answer 2

Circles aren't polygons as they don't have multiple sides.
Circles are all always the same shape, and can have different radii and diameters. The only answer choice left is that all circles have the same shape but different radii.