Answer: Intersecting at two points.
- A Touching externally
- B Intersecting at two points
- C One inside the other
- D Concentric
Correct answer: B. Intersecting at two points
Explanation: Centres (0,0) and (4,0), both radius 3, distance 4. Since |3−3| < 4 < 3+3, they intersect at two points.
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