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

A

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

B

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

C

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

D

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

Card 1 of 20

Spheres and Cones Flashcards

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

20 flashcards on Edexcel IGCSE Maths Spheres and Cones: the key terms, formulae and methods you need to recall for Paper 1 and Paper 2.

Flashcards