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Spheres and Cones

What step must be taken first if a 3D geometry question provides a diameter but the formula requires rrr?

A

Double the diameter to find the radius (r=2dr = 2dr=2d).

B

Halve the diameter to find the radius (r=d2r = \frac{d}{2}r=2d​).

C

Divide the diameter by π\piπ to find the radius (r=dπr = \frac{d}{\pi}r=πd​).

D

Square the diameter to find the radius (r=d2r = d^2r=d2).

Spheres and Cones Flashcards

  1. IGCSE
  2. /Maths
  3. /Spheres and Cones

Flashcards for CIE IGCSE Maths Spheres and Cones, covering the key terms, formulae and methods you need to recall for Paper 1 and Paper 3 (Core) or Paper 2 and Paper 4 (Extended). 20 cards, matched to the CIE IGCSE Maths (0580) specification.

Flashcards