IGCSE Maths / Circles, cylinders, cones and spheres

Frustums and truncated cones revision notes

Edexcel International GCSE Maths (4MA1), chapter 12: Circles, cylinders, cones and spheres, specification point 4.11c. Part of the full course.

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A frustum is the part of a cone left when its top is cut off. Find its volume by subtracting the smaller cone’s volume from the complete cone’s volume, using the radii to find any missing height.

More lessons in Circles, cylinders, cones and spheres

• Circumference of a circle
• Area of a circle
• Semicircles: perimeter and area
• Compound area with circles
• Arc length of a sector
• Area of a sector
• Perimeter of a sector
• Reverse sector problems
• Reverse circle problems
• Volume of a cylinder
• Surface area of a cylinder
• Leaving an answer in terms of pi
• Volume of a cone
• Surface area of a cone
• Volume of a sphere
• Surface area of a sphere
• Hemispheres and compound solids
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