How many sides and corners does the shape circle have?

Answer 1

A circle has no corners. In general "Side" is a term that is reserved for polygons; a polygon is a simple closed piecewise-linear curve in the plane with finitely many linear pieces and the number of sides of a polygon is the number of linear pieces.

For a circle - as far as how many side it has - the answer depends on the definition of the word "side."

There are valid arguments (depending of how "side" is defined) for 0, 1, 2, and ∞.

Since it has no flat edges you could argue for 0.

You could think of it as having 1 continuously curved side

A circle only has "inside", an "outside" and the set of points that define the circle so you could argue for 2.

You can draw infinitely many tangents to it - so you could argue ∞