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In plane geometry, an angle is the figure formed by two rays, called the sides of the angle, sharing a common endpoint, called the vertex of the angle.
Angles formed by two rays lie in a plane, but this plane does not have to be a Euclidean plane. Angles are also formed by the intersection of two planes in Euclidean and other spaces. These are called dihedral angles. Angles formed by the intersection of two curves in a plane are defined as the angle determined by the tangent rays at the point of intersection. Similar statements hold in space, for example, the spherical angle formed by two great circles on a sphere is the dihedral angle between the planes determined by the great circles.
Angle is also used to designate the measure of an angle or of a rotation. This measure is the ratio of the length of a circular arc to its radius. In the case of a geometric angle, the arc is centered at the vertex and delimited by the sides. In the case of a rotation, the arc is centered at the center of the rotation and delimited by any other point and its image by the rotation.
The word angle comes from the Latin word angulus, meaning "corner"; cognate words are the Greek ἀγκύλος (ankylοs), meaning "crooked, curved," and the English word "ankle". Both are connected with the Proto-Indo-European root *ank-, meaning "to bend" or "bow".Euclid defines a plane angle as the inclination to each other, in a plane, of two lines which meet each other, and do not lie straight with respect to each other. According to Proclus an angle must be either a quality or a quantity, or a relationship. The first concept was used by Eudemus, who regarded an angle as a deviation from a straight line; the second by Carpus of Antioch, who regarded it as the interval or space between the intersecting lines; Euclid adopted the third concept, although his definitions of right, acute, and obtuse angles are certainly quantitative.
For sale is a Keltec CP33 22 LR 33 round Pistol ($489). I am including a Farrowtech telescoping carbon fiber Pistol Brace adapter with A3 SteadyBrace ($200) and angled foregrip ($30) which turns this accurate high capacity gun into a great little PDW clone. Think poor man's MP7. Ready for...
Trying to gauge interest, honestly not sure I want to sell but let’s see. I’ve got other 5.45 rifles and this one seems the most unique. I have an angled adapter to allow to change to a standard AR-15 buffer tube extension but you’ll need an AK grip for it; the current set up is a buttstock and...
Does anyone near Beaverton/Tigard have a Glock rear sight tool for Glock 19’s with angled sights I could use for one quick install? Maybe meet at Starbucks and I’ll buy ya coffee?
or does anyone have one locally for sale?
Vortex Razor HD 16-48x65 Spotter Angled Spotting Scope
Been to the field twice. Excellent condition, as new
Comes in original box with soft cover
Vortex top tier spotter
Will throw in NEW Shadow Tech OD Green tripod, spiked feet and all, for another $100
Bought this, mounted it up, then realized that I really don't like the angle and way my wrist is torqued to grip it.
Will be going a different direction, so this is for sale basically new. Price is $50. Will ship to you for $5 if you're not local.
I've also got a ton of 550 and core-less...
I have a like new Vortex Razor HD Angled 20x60x85. "perfect glass" purchased new for $1600.00. It has a Manfrotto Carbon tripod valued at $300.00, Manfrotto 222 Joystick head with neoprene full body cover. It also comes with Nanuk 925 hard case valued at $125.00. Everything goes for $750.00
New condition. Haven't taken it out of the house. Mint condition. No scratches, no dings.
Comes with Vortex neoprene cover.
Objective Lens Diameter 65 mm
Linear Field of View 136.5-67.8 ft/1000 yds
Angular Field of View 2.6-1.3 degrees
Close Focus 23 feet