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Mathematics 25 Online
OpenStudy (anonymous):

line AC is the diameter. Calculate the area of the sector created by angle ADB 31.19 26.5 17.8 22.34

OpenStudy (anonymous):

@jim_thompson5910

jimthompson5910 (jim_thompson5910):

what is angle ADB equal to?

OpenStudy (anonymous):

idk its a third of the circle or 20 degrees ???

jimthompson5910 (jim_thompson5910):

x = measure of angle ADB x+20 = 180 x = ???

OpenStudy (anonymous):

160

jimthompson5910 (jim_thompson5910):

yep we will use this later

jimthompson5910 (jim_thompson5910):

what is the area of the entire circle?

OpenStudy (anonymous):

idk

jimthompson5910 (jim_thompson5910):

use the formula A = pi*r^2

jimthompson5910 (jim_thompson5910):

pi = 3.14 approximately r = radius = half of the diameter

OpenStudy (anonymous):

50.27

jimthompson5910 (jim_thompson5910):

correct

jimthompson5910 (jim_thompson5910):

now you multiply that by 160/360 to get the pie shaped sector formed by ADB

OpenStudy (anonymous):

22.34?

jimthompson5910 (jim_thompson5910):

and that is the approximate answer

OpenStudy (anonymous):

thanks!!!

jimthompson5910 (jim_thompson5910):

yw

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