1. Determine which sort of spiral you wish to draw.- Clockwise or Anticlockwise. 2. Wind a long string around a pillar box /telegraph pole / lampost /etc in the appropriate sense 3. Tie your pencil to the end. 4. Apply paper underfoot. 5. Press pencil to paper and walk away allowing string to unwind while keeping it taut. 6. Repeat using longer string and wider/ narrower post as required.
Chat with our AI personalities
Our own galaxy, the Milky Way, and our closest neighboring galaxy, Andromeda, are both spiral galaxies.
Screw, even though it has no moving parts. the spiral stairs of the Statue of Liberty are an oft-quoted example.
major advantage of spiral CT is higher resolution and the ability to reconstruct images anywhere along the length.Although spiral is more advantageous for many applications, conventional CT is still a superior and precise method for imaging many tissues.
earthworks
draw a straight line then draw a circle on that line at the top then draw a swirl in the circle