Answer: Equal in length.
- A Unequal
- B Equal in length
- C Perpendicular to each other
- D Parallel
Correct answer: B. Equal in length
Explanation: Tangents from an external point are equal in length. This follows from congruent right triangles.
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