suppose you have a dart board that has a diameter of 20 in. and it's divided into 20 congruent sectors. find the area of one sector. round your answer to the nearest tenth.
anyone know the answer to this?
2007-04-10 05:14:18 · 4 answers · asked by JoAnna 2 in Science & Mathematics ➔ Mathematics
So the redius is 10
area of the circle = pi*r^2
3.14*10*10
314/20(congruent sectors)
15.70 sqr inch.
round it up to 16 square inch. is the approximate area of each sector
2007-04-10 05:16:13 · answer #1 · answered by Anonymous · 0⤊ 1⤋
to find the area of each sector, find the area of the entrire circular object and then divide by 20
Area of dart board = pi*r^2 = 100pi
Area of sector = 100pi/20 = 5pi = 5 * 22/7 = 110/7 =15 5/7 in sq
2007-04-10 05:44:45 · answer #2 · answered by Anonymous · 0⤊ 0⤋
360/20=18 degrees
radius r=20/2=10
area=18 * pi*10/360
let pi=3
area=3/2=1,5 inch square
2007-04-10 05:28:48 · answer #3 · answered by iyiogrenci 6 · 0⤊ 1⤋
15.7 in^2 is the answer
2007-04-10 05:21:58 · answer #4 · answered by rani 2 · 0⤊ 1⤋