| 1. | The central angle is also known as the arc's angular distance.
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| 2. | Determining the central angle usually requires some non-trivial spherical geometry.
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| 3. | That gap has a central angle of 7.038 degrees, which is 23.46 % of 30 degrees.
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| 4. | The central angle of the regular polygon is formed at the center by the radii to two adjacent vertices.
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| 5. | This figure is formed by an angulated discal stripe united just about its central angle to a 3-shaped submarginal stripe.
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| 6. | These statements follow rather simply from the Central Angle Theorem and the fact that three non-collinear points give a unique circle.
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| 7. | A sector with the central angle of 180?is called a half-disk and is bounded by a diameter and a semicircle.
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| 8. | Assuming a radius " R " for the disc, a sector of disc with central angle " ? " has an area:
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| 9. | Note that the sides of a spherical triangle are measured by angular rather than linear units, based on the corresponding central angles.
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| 10. | If the polygon required has " n " sides, then the central angle opposite one side will be 360 / " n ".
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