Key learning points

1. A chord splits the circle into two uneven pieces.
2. The smaller piece is the minor segment and the larger is the major segment.
3. Sectors look familiar as you broke a circle into sectors to draw a pie chart.
4. The circumference of a circle is found using C = πd or C = 2πr
5. The area of a circle is found using A = πr²

Keywords

• Chord - A chord is any line segment joining two points on the circumference of a circle.

• Segment - Two segments are created when dividing a circle into two parts using a chord.

• Sector - A sector is the region formed between two radii and their connecting arc.

• Arc - An arc is part of a curve. An arc of a circle is part of the circle’s circumference.

Common misconception