Some basic questions in geometry.

• What is straight line ?
  • It looks complicated but all the heavy words are explained below
  • It’s just a curve, when it’s tangent vector stay tangent when parallely transported along the curve.
• What is curve ?
  • Object similar to a line but that need not be straight.
  • Thus, a curve is a generalization of a line.
• What is parallel transported ?
  • It means transferring things parallel, here moving vector together, working things in parallel or transposing parallely
• What is vector ?
  • In physics and geometry, (Euclidean vector or a direction vector), used to represent physical quantities that have both magnitude and direction.
• What is tangent vector ?
  • Any vector that is tangent to curve is tangent vector.
• What is tangent to curve ?
  • Tangent vector to curve is the line that touch it only at one point.