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#top Alternate Angles

From The Collaborative International Dictionary of English v.0.48 [gcide]:

Alternate \Al*ter"nate\ (?; 277), adjective [L. alternatus, p. p. of alternate, fr. alternus. See {Altern}, {Alter}.]

1. Being or succeeding by turns; one following the other in succession of time or place; by turns first one and then the other; hence, reciprocal.

2. Designating the members in a series, which regularly intervene between the members of another series, as the odd or even numbers of the numerals; every other; every second; as, the alternate members 1, 3, 5, 7, etc.; read every alternate line.

3. (Bot.) Distributed, as leaves, singly at different heights of the stem, and at equal intervals as respects angular divergence. --Gray.

{Alternate angles} (Geom.), the internal and angles made by two lines with a third, on opposite sides of it. It the parallels AB, CD, are cut by the line EF, the angles AGH, GHD, as also the angles BGH and GHC, are called alternate angles.

From The Collaborative International Dictionary of English v.0.48 [gcide]:

Angle \An"gle\ ([a^][ng]"g'l), noun [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.

{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.

{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}.

{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.