Sectors of circles (Edexcel GCSE Maths): Flashcards

A portion of a circle like a slice of pie

Minor sector and major sector

The smaller portion of the circle

The larger portion of the circle

Two straight lines from centre to edge of circle

$\frac{x}{360°}$

$\frac{x}{360°} \times \pi r^2$

The curved edge of the sector

$\frac{x}{360°} \times 2\pi r$

Arc length + radius + radius (or arc + 2r)

Degrees (not radians)

Both radii (2 × radius)

Only at the final answer for better accuracy