直角

[ noun ]
the 90 degree angle between two perpendicular lines
<noun.shape>

Right \Right\ (r[imac]t), a. [OE. right, riht, AS. riht; akin to
D. regt, OS. & OHG. reht, G. recht, Dan. ret, Sw. r["a]tt,
Icel. r["e]ttr, Goth. ra['i]hts, L. rectus, p. p. of regere
to guide, rule; cf. Skr. [.r]ju straight, right. [root]115.
Cf. {Adroit},{Alert}, {Correct}, {Dress}, {Regular},
{Rector}, {Recto}, {Rectum}, {Regent}, {Region}, {Realm},
{Rich}, {Royal}, {Rule}.]
1. Straight; direct; not crooked; as, a right line. ``Right
as any line.'' --Chaucer

2. Upright; erect from a base; having an upright axis; not
oblique; as, right ascension; a right pyramid or cone.

3. Conformed to the constitution of man and the will of God,
or to justice and equity; not deviating from the true and
just; according with truth and duty; just; true.

That which is conformable to the Supreme Rule is
absolutely right, and is called right simply without
relation to a special end. --Whately.

2. Fit; suitable; proper; correct; becoming; as, the right
man in the right place; the right way from London to
Oxford.

5. Characterized by reality or genuineness; real; actual; not
spurious. ``His right wife.'' --Chaucer.

In this battle, . . . the Britons never more plainly
manifested themselves to be right barbarians.
--Milton.

6. According with truth; passing a true judgment; conforming
to fact or intent; not mistaken or wrong; not erroneous;
correct; as, this is the right faith.

You are right, Justice, and you weigh this well.
--Shak.

If there be no prospect beyond the grave, the
inference is . . . right, ``Let us eat and drink,
for to-morrow we die.'' --Locke.

7. Most favorable or convenient; fortunate.

The lady has been disappointed on the right side.
--Spectator.

8. Of or pertaining to that side of the body in man on which
the muscular action is usually stronger than on the other
side; -- opposed to left when used in reference to a part
of the body; as, the right side, hand, arm. Also applied
to the corresponding side of the lower animals.

Became the sovereign's favorite, his right hand.
--Longfellow.

Note: In designating the banks of a river, right and left are
used always with reference to the position of one who
is facing in the direction of the current's flow.

9. Well placed, disposed, or adjusted; orderly; well
regulated; correctly done.

10. Designed to be placed or worn outward; as, the right side
of a piece of cloth.

{At right angles}, so as to form a right angle or right
angles, as when one line crosses another perpendicularly.


{Right and left}, in both or all directions. [Colloq.]

{Right and left coupling} (Pipe fitting), a coupling the
opposite ends of which are tapped for a right-handed screw
and a left-handed screw, respectivelly.

{Right angle}.
(a) The angle formed by one line meeting another
perpendicularly, as the angles ABD, DBC.
(b) (Spherics) A spherical angle included between the
axes of two great circles whose planes are
perpendicular to each other.

{Right ascension}. See under {Ascension}.

{Right Center} (Politics), those members belonging to the
Center in a legislative assembly who have sympathies with
the Right on political questions. See {Center}, n., 5.

{Right cone}, {Right cylinder}, {Right prism}, {Right
pyramid} (Geom.), a cone, cylinder, prism, or pyramid, the
axis of which is perpendicular to the base.

{Right line}. See under {Line}.

{Right sailing} (Naut.), sailing on one of the four cardinal
points, so as to alter a ship's latitude or its longitude,
but not both. --Ham. Nav. Encyc.

{Right sphere} (Astron. & Geol.), a sphere in such a position
that the equator cuts the horizon at right angles; in
spherical projections, that position of the sphere in
which the primitive plane coincides with the plane of the
equator.

Note: Right is used elliptically for it is right, what you
say is right, true.

``Right,'' cries his lordship. --Pope.

Syn: Straight; direct; perpendicular; upright; lawful;
rightful; true; correct; just; equitable; proper;
suitable; becoming.


Angle \An"gle\ ([a^][ng]"g'l), n. [F. angle, L. angulus angle,
corner; akin to uncus hook, Gr. 'agky`los bent, crooked,
angular, 'a`gkos a bend or hollow, AS. angel hook, fish-hook,
G. angel, and F. anchor.]
1. The inclosed space near the point where two lines meet; a
corner; a nook.

Into the utmost angle of the world. --Spenser.

To search the tenderest angles of the heart.
--Milton.

2. (Geom.)
(a) The figure made by. two lines which meet.
(b) The difference of direction of two lines. In the lines
meet, the point of meeting is the vertex of the angle.

3. A projecting or sharp corner; an angular fragment.

Though but an angle reached him of the stone.
--Dryden.

4. (Astrol.) A name given to four of the twelve astrological
``houses.'' [Obs.] --Chaucer.

5. [AS. angel.] A fishhook; tackle for catching fish,
consisting of a line, hook, and bait, with or without a
rod.

Give me mine angle: we 'll to the river there.
--Shak.

A fisher next his trembling angle bears. --Pope.

{Acute angle}, one less than a right angle, or less than
90[deg].

{Adjacent} or {Contiguous angles}, such as have one leg
common to both angles.

{Alternate angles}. See {Alternate}.

{Angle bar}.
(a) (Carp.) An upright bar at the angle where two faces of
a polygonal or bay window meet. --Knight.
(b) (Mach.) Same as {Angle iron}.

{Angle bead} (Arch.), a bead worked on or fixed to the angle
of any architectural work, esp. for protecting an angle of
a wall.

{Angle brace}, {Angle tie} (Carp.), a brace across an
interior angle of a wooden frame, forming the hypothenuse
and securing the two side pieces together. --Knight.

{Angle iron} (Mach.), a rolled bar or plate of iron having
one or more angles, used for forming the corners, or
connecting or sustaining the sides of an iron structure to
which it is riveted.

{Angle leaf} (Arch.), a detail in the form of a leaf, more or
less conventionalized, used to decorate and sometimes to
strengthen an angle.

{Angle meter}, an instrument for measuring angles, esp. for
ascertaining the dip of strata.

{Angle shaft} (Arch.), an enriched angle bead, often having a
capital or base, or both.

{Curvilineal angle}, one formed by two curved lines.

{External angles}, angles formed by the sides of any
right-lined figure, when the sides are produced or
lengthened.

{Facial angle}. See under {Facial}.

{Internal angles}, those which are within any right-lined
figure.

{Mixtilineal angle}, one formed by a right line with a curved
line.

{Oblique angle}, one acute or obtuse, in opposition to a
right angle.

{Obtuse angle}, one greater than a right angle, or more than
90[deg].

{Optic angle}. See under {Optic}.

{Rectilineal} or {Right-lined angle}, one formed by two right
lines.

{Right angle}, one formed by a right line falling on another
perpendicularly, or an angle of 90[deg] (measured by a
quarter circle).

{Solid angle}, the figure formed by the meeting of three or
more plane angles at one point.

{Spherical angle}, one made by the meeting of two arcs of
great circles, which mutually cut one another on the
surface of a globe or sphere.

{Visual angle}, the angle formed by two rays of light, or two
straight lines drawn from the extreme points of an object
to the center of the eye.

{For Angles of commutation}, {draught}, {incidence},
{reflection}, {refraction}, {position}, {repose}, {fraction},
see {Commutation}, {Draught}, {Incidence}, {Reflection},
{Refraction}, etc.