Triangle
Rectangle
Circle
Square
Answer is Wrong!
Answer is Right!
The answer is C. Circle.
A triangle, rectangle, and square are all polygons, which are two-dimensional shapes with straight sides. A circle is a curved shape.
A triangle has three sides and three angles. A rectangle has four sides and four angles, with opposite sides parallel and opposite angles congruent. A square has four sides of equal length and four angles of equal measure, all of which are 90 degrees. A circle has no sides or angles.
The circle is the only shape that is not a polygon.