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Key measurements and cone formulae

Key measurements and cone formulae

Labelled cone showing base radius, vertical height, slant height, and the right triangle inside the cone

Spheres and cones are built from circles, so most formulae use the radius rrr. If a question gives the diameter ddd, convert first with r=d2r = \frac{d}{2}r=2d​.

Spheres and Cones Lesson

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

Step-by-step lessons on Edexcel IGCSE Maths Spheres and Cones. Each one builds up to exam-style questions. Build confidence with the shared Foundation-tier content first, since roughly 40% of Higher-tier marks are targeted at the grades 4–5 boundary that both tiers have in common.

Lessons