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  2. Cam (mechanism) - Wikipedia

    en.wikipedia.org/wiki/Cam_(mechanism)

    If the profile is treated as a large base circle and a small tip circle, joined by a common tangent, giving lift L, the relationship can be calculated, given the angle φ between one tangent and the axis of symmetry (φ being ⁠ π / 2 ⁠ − ⁠ θ / 2 ⁠), while C is the distance between the centres of the circles (required), and R is the ...

  3. Engineering drawing - Wikipedia

    en.wikipedia.org/wiki/Engineering_drawing

    Using the auxiliary view allows for that inclined plane (and any other significant features) to be projected in their true size and shape. The true size and shape of any feature in an engineering drawing can only be known when the Line of Sight (LOS) is perpendicular to the plane being referenced. It is shown like a three-dimensional object.

  4. Isometric projection - Wikipedia

    en.wikipedia.org/wiki/Isometric_projection

    Classification of Isometric projection and some 3D projections. The term "isometric" comes from the Greek for "equal measure", reflecting that the scale along each axis of the projection is the same (unlike some other forms of graphical projection).

  5. Oblique projection - Wikipedia

    en.wikipedia.org/wiki/Oblique_projection

    The projectors in oblique projection intersect the projection plane at an oblique angle to produce the projected image, as opposed to the perpendicular angle used in orthographic projection. Mathematically, the parallel projection of the point ( x , y , z ) {\displaystyle (x,y,z)} on the x y {\displaystyle xy} -plane gives ( x + a z , y + b z ...

  6. Cross section (geometry) - Wikipedia

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

    A cross-section of a solid right circular cylinder extending between two bases is a disk if the cross-section is parallel to the cylinder's base, or an elliptic region (see diagram at right) if it is neither parallel nor perpendicular to the base. If the cutting plane is perpendicular to the base it consists of a rectangle (not shown) unless it ...

  7. Axonometric projection - Wikipedia

    en.wikipedia.org/wiki/Axonometric_projection

    Classification of Axonometric projection and some 3D projections "Axonometry" means "to measure along the axes". In German literature, axonometry is based on Pohlke's theorem, such that the scope of axonometric projection could encompass every type of parallel projection, including not only orthographic projection (and multiview projection), but also oblique projection.

  8. Plücker coordinates - Wikipedia

    en.wikipedia.org/wiki/Plücker_coordinates

    Then their respective planes are perpendicular to vectors a and b, and the direction of L must be perpendicular to both. Hence we may set d = a × b, which is nonzero because a, b are neither zero nor parallel (the planes being distinct and intersecting). If point x satisfies both plane equations, then it also satisfies the linear combination

  9. Base (geometry) - Wikipedia

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

    The extended base of a triangle (a particular case of an extended side) is the line that contains the base. When the triangle is obtuse and the base is chosen to be one of the sides adjacent to the obtuse angle , then the altitude dropped perpendicularly from the apex to the base intersects the extended base outside of the triangle.