Geometry: Area of a Sector?
Find the area of one sector!?
Suppose you have a dart board that has a diameter of 20 and it is divided into 20 congruent sectors
Part 1 Find the central angle.(Hint a circle has 360)
Part 2 Find the fraction of the circle that one sector will take up.
Part 3 Use the fractional part from part 2 with the area formula to find the area of one sector of the circle to the nearest tenth.
Area of sector= AB/360(3.14)(radius)squared
H E L P! :0
- Rover118Lv 59 years agoFavorite Answer
1)360/20 = 18 ; 2) 18/360 = 1/20
3) Area of Circle is Pi X r^2. So r = 10 & Pi = 3.142. r^2 = 100 so area of full circle is 314.2
Each segment is 314.2/20 = 157.1