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  2. Speed square - Wikipedia

    en.wikipedia.org/wiki/Speed_square

    Common lines made using a speed square include perpendicular cut marks and Angles definition of an angle for roofs, stairways, and decks. The tool uses a 0° reference. This means when a board is squared off the tool reads 0°. The angle derived is actually a complementary angle, for example a 22.5° angle is actually 67.5°. The sum of the ...

  3. Internal and external angles - Wikipedia

    en.wikipedia.org/wiki/Internal_and_external_angles

    The interior angle concept can be extended in a consistent way to crossed polygons such as star polygons by using the concept of directed angles.In general, the interior angle sum in degrees of any closed polygon, including crossed (self-intersecting) ones, is then given by 180(n–2k)°, where n is the number of vertices, and the strictly positive integer k is the number of total (360 ...

  4. Straightedge and compass construction - Wikipedia

    en.wikipedia.org/wiki/Straightedge_and_compass...

    Angle trisection is the construction, using only a straightedge and a compass, of an angle that is one-third of a given arbitrary angle. This is impossible in the general case. For example, the angle 2 π /5 radians (72° = 360°/5) can be trisected, but the angle of π /3 radians (60°) cannot be trisected. [8]

  5. Framing (construction) - Wikipedia

    en.wikipedia.org/wiki/Framing_(construction)

    Interior loadbearing walls are framed in the same way as exterior walls. Studs are usually 1 + 1 ⁄ 2 in × 3 + 1 ⁄ 2 in (38 mm × 89 mm) lumber spaced at 16 in (410 mm) on center. This spacing may be changed to 12 or 24 in (300 or 610 mm) depending on the loads supported and the type and thickness of the wall finish used. [12]

  6. Calculator - Wikipedia

    en.wikipedia.org/wiki/Calculator

    In 1985, CI launched a calculator for the construction industry called the Construction Master [49] which came preprogrammed with common construction calculations (such as angles, stairs, roofing math, pitch, rise, run, and feet-inch fraction conversions). This would be the first in a line of construction related calculators.

  7. Did You Catch the Cameo by a Legendary Cowboy in the ... - AOL

    www.aol.com/did-catch-cameo-legendary-cowboy...

    The first episode of Yellowstone season five, part two concludes with a message that reads simply: "In Loving Memory of Billy Klapper.". Klapper was a real-life cowboy who features in a poignant ...

  8. Steel square - Wikipedia

    en.wikipedia.org/wiki/Steel_square

    The complementary angles of the arc tan are used on most angle measuring devices in construction. The tangent of hip, valley, and jack rafters are less than 1.00 in all pitches above 0°. An eighteen pitch has a side cut angle of 29.07° and a two pitch has a side cut angle of 44.56° for jack rafters. This is a variation of 15.5° between pitches.

  9. The 11 best Black Friday deals you can shop before midnight - AOL

    www.aol.com/lifestyle/the-11-best-black-friday...

    Case in point: Many of the season's hottest deals are expected to sell out before your leftovers have even cooled down. Take, for example, these AirPods Pro, which are down to the lowest price of ...

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