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2. American wire gauge - Wikipedia

   en.wikipedia.org/wiki/American_wire_gauge

   American Wire Gauge ( AWG) is a logarithmic stepped standardized wire gauge system used since 1857, predominantly in North America, for the diameters of round, solid, nonferrous, electrically conducting wire. Dimensions of the wires are given in ASTM standard B 258. [ 1] The cross-sectional area of each gauge is an important factor for ...

3. Skeet shooting - Wikipedia

   en.wikipedia.org/wiki/Skeet_shooting

   For the American version of the sport, the clay discs are 4 + 5 ⁄ 16 inches (109.54 mm) in diameter, 1 + 1 ⁄ 8 inches (28.58 mm) thick, and fly a distance of 62 yards (57 m). The international version of skeet uses a target that is slightly larger in diameter [(110±1) mm vs. 109.54 mm], thinner in cross-section [(25.5±.5) mm vs. 28.58 mm ...

4. Point (typography) - Wikipedia

   en.wikipedia.org/wiki/Point_(typography)

   In typography, the point is the smallest unit of measure. It is used for measuring font size, leading, and other items on a printed page. The size of the point has varied throughout printing's history. Since the 18th century, the size of a point has been between 0.18 and 0.4 millimeters. Following the advent of desktop publishing in the 1980s ...

5. Compass (drawing tool) - Wikipedia

   en.wikipedia.org/wiki/Compass_(drawing_tool)

   A compass, also commonly known as a pair of compasses, is a technical drawing instrument that can be used for inscribing circles or arcs. As dividers, it can also be used as a tool to mark out distances, in particular, on maps. Compasses can be used for mathematics, drafting, navigation and other purposes. Prior to computerization, compasses ...

6. Apollonius of Perga - Wikipedia

   en.wikipedia.org/wiki/Apollonius_of_Perga

   A diameter is a chord passing through the centroid, which always bisects it. For the circle and ellipse, let a grid of parallel chords be superimposed over the figure such that the longest is a diameter and the others are successively shorter until the last is not a chord, but is a tangent point. The tangent must be parallel to the diameter.

7. Incircle and excircles - Wikipedia

   en.wikipedia.org/wiki/Incircle_and_excircles

   The center of the incircle is a triangle center called the triangle's incenter. [ 1] An excircle or escribed circle[ 2] of the triangle is a circle lying outside the triangle, tangent to one of its sides and tangent to the extensions of the other two. Every triangle has three distinct excircles, each tangent to one of the triangle's sides.