IGCSE Maths / Circles, cylinders, cones and spheres

Perimeter of a sector

Edexcel International GCSE Maths (4MA1), chapter 12: Circles, cylinders, cones and spheres, specification point 4.9a. Part of the full course.

Read the revision notes · IGCSE Maths past papers

A sector’s perimeter is the whole distance around its outside: the curved arc plus two straight radii. Find the arc using the fraction of a full turn, then add 2r.

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
• 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
• Frustums and truncated cones
• Reverse volume and surface area problems