sector

Everyday

1. (maths) A sector is a part of a circle between two radii and the curve, shaped like a slice of pie. tree →
2. A sector is a part or area of a place, like a part of a city. tree →
3. A sector is one part of a country's business or work, like farming or health. tree →

In the lessons

In maths lessons: pie charts are made of sectors; a sector of a circle has an angle at the centre. In social studies: the public sector, the health sector. Phrases: «sector of a circle», «the public sector», «private sector».

Examples

• Each sector of the pie chart shows one favourite fruit. tree →
• A quarter of a circle is a sector with an angle of 90 degrees. tree →
• The farm sector employs many people. tree →
• The soldiers patrolled their sector of the city. tree →
• The biggest sector of the chart was football. tree →
• Shade the sector between the two radii. tree →

Note

In a pie chart, sector angle = (part ÷ total) × 360°. A sector is not the same as a segment (the part between a chord and the curve).