Which shape will be called a regular shape?

One whose all sides and angles are equal

A regular shape is a geometric shape with equal corresponding sides and equal corresponding angles. Its parts follow a consistent pattern, so it has a balanced and predictable form. A square is regular because all four sides are equal and all four angles are equal. An equilateral triangle is another example because its three sides and three angles are equal. This definition concerns geometric equality, not clarity or artistic neatness.

Option A is correct. Option B describes an irregular shape, while option C describes a free-form outline that does not follow a fixed geometric rule. A blurred object in option D is not a definition of any regular shape; it only describes poor visibility. Therefore the equality of sides and angles is the decisive feature, and the supplied answer is consistent.

This is a Class 9 Art Education question. Chapter: Elements of Art. Topic: Shape.