Post Summarisation: 1. Spiral 2. Archimedean Spiral 3. Logarithmic Spiral Spiral: When a line rotates on a plane about one of its end, on such a way that a point moves along the line continuously in one direction (inward or outward), the curve traced out by the moving point is called a S piral . The point about which the curve line rotates is called a P ole . The line joining any point on the curve with the pole is called the Radius Vector and the angle between this line and the line in its initial position (or, Horizontal axis line) is called the Vector angle or Vectorial angle . Each complete revolution of the curve is termed the C onvolution . A spiral may make any number of convolutions before reaching the pole. Archimedean Spiral: When a curve is traced out by a moving point in such a way that its movement inwards or outward from the pole is uniform with the decrease or increase of Vectorial...