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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. 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.

  5. 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:

  6. Euler angles - Wikipedia

    en.wikipedia.org/wiki/Euler_angles

    The top spins around its own axis of symmetry; this corresponds to its intrinsic rotation. It also rotates around its pivotal axis, with its center of mass orbiting the pivotal axis; this rotation is a precession. Finally, the top can wobble up and down; the inclination angle is the nutation angle.

  7. Line (geometry) - Wikipedia

    en.wikipedia.org/wiki/Line_(geometry)

    The normal form of the equation of a straight line on the plane is given by: ⁡ + ⁡ =, where is the angle of inclination of the normal segment (the oriented angle from the unit vector of the x-axis to this segment), and p is the (positive) length of the normal segment.

  8. Inclination (disambiguation) - Wikipedia

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

    Inclination is the angle between a reference plane ... Slope, tilt, steepness, or angle from horizontal of a line (in mathematics and geometry) Axial tilt, also known ...

  9. Axis–angle representation - Wikipedia

    en.wikipedia.org/wiki/Axis–angle_representation

    The angle θ and axis unit vector e define a rotation, concisely represented by the rotation vector θe.. In mathematics, the axis–angle representation parameterizes a rotation in a three-dimensional Euclidean space by two quantities: a unit vector e indicating the direction of an axis of rotation, and an angle of rotation θ describing the magnitude and sense (e.g., clockwise) of the ...