Both, circles and spheres are circular objects. A circle is a two-dimensional figure, while a sphere is a three-dimensional figure.

A Circle and Ellipse have closed curved shapes. In a circle, all the points are equally far from the center, which is not the case with an ellipse; in an ellipse, all the points are at different distances from...

Convex refers to a curvature that extends outwards, whereas non-convex refers to a curvature that extends inward. Non-convex is also referred to as concave.

Concave is used to describe an entity having an outline that curves inwards. On the other hand, convex is used to describe an entity having an outline or surface that bulges out. The terms are used as...

A polygon whose all interior angles are less than 180 degrees is known as a convex polygon. On the other hand, a polygon with one or more interior angles greater than 180 degrees is referred to as a concave...