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  2. Schema for vertical declining dials - Wikipedia

    en.wikipedia.org/wiki/Schema_for_vertical...

    AV- Angle to vertical? -this is used to fix a starting point, in the final stage of laying out equal hours with a protractor. With a calculator this can be easily be derived from the SD and DL, when using compass and ruler it is a construction base line. It never appears on the final dial. The four basic calculation have a certain symmetry.

  3. Goniometer - Wikipedia

    en.wikipedia.org/wiki/Goniometer

    A protractor is a measuring instrument, typically made of transparent plastic, for measuring angles. Some protractors are simple half-discs or full circles. More advanced protractors, such as the bevel protractor, have one or two swinging arms, which can be used to help measure the angle. Most protractors measure angles in degrees (°).

  4. Stadimeter - Wikipedia

    en.wikipedia.org/wiki/Stadimeter

    A stadimeter is an optical device for estimating the range to an object of known height by measuring the angle between the top and bottom of the object as observed at the device. It is similar to a sextant , in that the device is using mirrors to measure an angle between two objects but differs in that one dials in the height of the object.

  5. Inclinometer - Wikipedia

    en.wikipedia.org/wiki/Inclinometer

    An inclinometer or clinometer is an instrument used for measuring angles of slope, elevation, or depression of an object with respect to gravity's direction. It is also known as a tilt indicator , tilt sensor , tilt meter , slope alert , slope gauge , gradient meter , gradiometer , level gauge , level meter , declinometer , and pitch & roll ...

  6. Sliding T bevel - Wikipedia

    en.wikipedia.org/wiki/Sliding_T_bevel

    T bevel with protractor and dividers In use. A sliding T bevel, also known as a bevel gauge or false square [1] is an adjustable gauge for setting and transferring angles. . Different from the square, which is fixed and can only set a 90° angle, the sliding T bevel can set any angle and transfer it on anoth

  7. Sine bar - Wikipedia

    en.wikipedia.org/wiki/Sine_bar

    Angles are measured using a sine bar with the help of gauge blocks and a dial gauge or a spirit level. The aim of a measurement is to measure the surface on which the dial gauge or spirit level is placed horizontally. For example, to measure the angle of a wedge, the wedge is placed on a horizontal table. The sine bar is placed over the ...

  8. Square (tool) - Wikipedia

    en.wikipedia.org/wiki/Square_(tool)

    Speed square, or rafter square, or rafter angle square, or triangle square, or layout square A speed square is a triangular carpenters square combining functions of the combination square, try square, and framing square into one. It can be used to calculate and mark angles, to suspend a plumb bob, and as a fence for a circular saw. [21] [22] [23]

  9. Speed square - Wikipedia

    en.wikipedia.org/wiki/Speed_square

    The angle derived is actually a complementary angle, for example a 22.5° angle is actually 67.5°. The sum of the angles equals 90 degrees (22.5° +67.5°= 90°). It is also obvious from a visual check when using a protractor that where the instruments displays 22.5° is

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