Terms of Endearment
Areas of Circles and
Sectors: 11.5
Area of a Circle
• A = (pi)r2
Area of a Sector
• Area of a sector is really a
  percentage of the circle’s area, so
  we take that percentage of the area
  by taking the arc’s degrees and
  dividing by 360 to find out what part
  we are measuring
• (Arc Measure/360)(area)

11.5 terms

  • 1.
    Terms of Endearment Areasof Circles and Sectors: 11.5
  • 2.
    Area of aCircle • A = (pi)r2
  • 3.
    Area of aSector • Area of a sector is really a percentage of the circle’s area, so we take that percentage of the area by taking the arc’s degrees and dividing by 360 to find out what part we are measuring • (Arc Measure/360)(area)