Key measurements and cone formulae
Key measurements and cone formulae
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.
Key measurements and cone formulae
Key measurements and cone formulae
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.
Step-by-step lessons covering CIE IGCSE Maths Spheres and Cones for Core and Extended tier. Each lesson works through exam-style questions in Paper 1 and Paper 3 (Core) or Paper 2 and Paper 4 (Extended) format. Start with the Core-tier fundamentals in number and algebra before moving on to the more demanding Extended-only topics like calculus-adjacent algebra and advanced trigonometry.