Answer: A line touching circle at exactly one point.
- A A line segment joining two points on the circle
- B A line touching circle at exactly one point
- C A chord passing through the centre of the circle
- D A line cutting the circle at two distinct points
Correct answer: B. A line touching circle at exactly one point
Explanation: A tangent touches the circle at exactly one point. It is perpendicular to the radius at the point of contact.
Three standard 3D solids and their key formulas: a cylinder's volume scales with the full height, a cone's volume is exactly one-third of the cylinder with the same base and height, and a sphere's volume and surface area both follow distinct r-based formulas worth memorising separately.
Concept context
Perimeters, areas, and volumes of 2D and 3D shapes