Information AboutOval |
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In geometry, an oval or '''ovoid''' (from Latin ''ovum'', 'egg') is any Curve resembling an Egg or an Ellipse . Unlike other curves, the term 'oval' is not well-defined and many distinct curves are commonly called ovals. These curves have in common that:
The word ovoidal refers to the characteristic of being an ovoid. Other examples of ovals described elsewhere include: A track is known as a stadium, and is actually not a rounded rectangle. EGG SHAPE The shape of an Egg is approximately that of half each a Prolate (long) and roughly spherical (potentially even minorly Oblate /short) Ellipsoid joined at the equator, sharing a Principal Axis of Rotational Symmetry , as illustrated above. Although the term ''egg-shaped'' usually implies a lack of Reflection Symmetry across the equatorial plane, it may also refer to true prolate ellipsoids. It can also be used to describe the 2-dimensional figure that, revolved around its Major Axis , produces the 3-dimensional surface. PROJECTIVE PLANES In the theory of Projective Plane s, ''oval'' is used to mean a set of ''q'' + 1 non- Collinear points in PG(2,q), the projective plane over the Finite Field with ''q'' elements. See Oval (projective Plane) . |
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