Answer: Equals the inscribed angle in alternate segment.
- A Equals the inscribed angle in alternate segment
- B Is typically assumed to be 90°, mistaking it for the radius-tangent angle
- C Is typically assumed to be 45°, assuming the chord bisects the tangent angle
- D Equals the central angle subtended by the same chord
Correct answer: A. Equals the inscribed angle in alternate segment
Explanation: Tangent-chord angle = inscribed angle in alternate segment (alternate segment theorem).
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