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"Oval" is an imprecise term. It could be an ellipse, where the shape has a curved boundary all the way round or it could be like a running track: two semicircles with straight line segments joining them. The formula for the area will be different.
There are several different "oval" shapes. A running track, which comprises two semicircles separated by two straight stretches is an oval. So is the cross section of an egg - a shape in which the cross-sectional width does not change uniformly. Another example is the ellipse. Because all these shapes are called ovals, there is no single name.
An ellipse is the proper name for an oval shape, however, a circle is a closed curved shape similar to an oval shape.
Oval kind of a heart shape but its mostly oval
An oval is two-dimensional. An ovoid is a three-dimensional shape based on an oval - like an egg,