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ABOUT
OVAL
In technical drawing an oval (from Latin ovum, 'egg') is a figure
constructed from two pairs of arcs, with two different radii (see
image on the right). The arcs are joined at a point, in which lines
tangential to both joining arcs lie on the same line, thus making
the joint smooth. Any point of an oval belongs to an arc with a constant
radius (shorter or longer), whereas in an ellipse the radius is continously
changing.
Oval
in geometry
In geometry, an oval or ovoid 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:
* they are differentiable (smooth-looking), simple (not self-intersecting),
convex, closed, plane curves;
* their shape does not depart much from that of an ellipse, and
* there is at least one axis of symmetry.
The word ovoidal refers to the characteristic of being an ovoid. Other
examples of ovals described elsewhere include:
* Cassini ovals
* elliptic curves
* superellipse
Egg
shape
The shape of an egg is approximately that of half each a prolate (long)
and roughly spherical (potentially even slightly 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.
The
Oval Office
The Oval Office is the official office of the President of the United
States. Created in 1909 as part of an overall expansion of the West
Wing of the White House during the administration of William Howard
Taft, the office was inspired by the elliptical Blue Room. The room
features three large south-facing windows behind the president's desk
and a fireplace at the north end of the room. The Oval Office has
four doors: the east door opens to the Rose Garden; the west door
leads to a private smaller study and dining room; the northwest door
opens onto the main corridor of the West Wing; and the northeast door
opens to the office of the president's secretary.
