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  2. Grade (slope) - Wikipedia

    en.wikipedia.org/wiki/Grade_(slope)

    α = angle of inclination. The grade (US) or gradient (UK) (also called stepth, slope, incline, mainfall, pitch or rise) of a physical feature, landform or constructed line is either the elevation angle of that surface to the horizontal or its tangent. It is a special case of the slope, where zero indicates horizontality. A larger number ...

  3. Spherical coordinate system - Wikipedia

    en.wikipedia.org/wiki/Spherical_coordinate_system

    The mathematics convention. Spherical coordinates (r, θ, φ) as typically used: radial distance r, azimuthal angle θ, and polar angle φ. + The meanings of θ and φ have been swapped—compared to the physics convention. The 'south'-direction x-axis is depicted but the 'north'-direction x-axis is not.

  4. Inclination (disambiguation) - Wikipedia

    en.wikipedia.org/wiki/Inclination_(disambiguation)

    Inclination is the angle between a ... Slope, tilt, steepness, or angle from horizontal of a line (in mathematics and ... "Inclination" (novella), a science fiction ...

  5. Slope - Wikipedia

    en.wikipedia.org/wiki/Slope

    Slope: = = ⁡ In mathematics, the slope or gradient of a line is a number that describes the direction of the line on a plane. [1] Often denoted by the letter m, slope is calculated as the ratio of the vertical change to the horizontal change ("rise over run") between two distinct points on the line, giving the same number for any choice of points.

  6. Retrograde and prograde motion - Wikipedia

    en.wikipedia.org/wiki/Retrograde_and_prograde_motion

    The inclination of moons is measured from the equator of the planet they orbit. An object with an inclination between 0 and 90 degrees is orbiting or revolving in the same direction as the primary is rotating. An object with an inclination of exactly 90 degrees has a perpendicular orbit that is neither prograde nor retrograde.

  7. Incline - Wikipedia

    en.wikipedia.org/wiki/Incline

    Incline, inclined, inclining, or inclination may refer to: Grade (slope), the tilt, steepness, or angle from horizontal of a topographic feature (hillside, meadow, etc.) or constructed element (road, railway, field, etc.) Slope, the tilt, steepness, or angle from horizontal of a line (in mathematics and geometry) Incline may also refer to:

  8. The latest longevity trend? Social wellness clubs - AOL

    www.aol.com/latest-longevity-trend-social...

    Science & Tech. Sports. Weather. The latest longevity trend? Social wellness clubs. Kylie Gilbert. January 13, 2025 at 1:00 PM. NDAB Creativity // Shutterstock.

  9. Orbital inclination - Wikipedia

    en.wikipedia.org/wiki/Orbital_inclination

    An inclination of 63.4° is often called a critical inclination, when describing artificial satellites orbiting the Earth, because they have zero apogee drift. [3] An inclination of exactly 90° is a polar orbit, in which the spacecraft passes over the poles of the planet. An inclination greater than 90° and less than 180° is a retrograde orbit.