LegendaryRose5
LegendaryRose5 LegendaryRose5
  • 13-05-2020
  • Mathematics
contestada

Please!! I have to do this by tonight!!

Please I have to do this by tonight class=

Respuesta :

ronhagrid310
ronhagrid310 ronhagrid310
  • 13-05-2020

Answer:

Prob.3

Denote r: radius of circle O

Formula for calculating AOB sector:

Area = pi*r^2*angle/360

Area = pi*r^2*45/360 = 18 pi

=> r^2 = 18*360/45 = 144

=> r = 12

For prob.4, give it a try, follow the formula I gave. Good luck !

(answer : r = 6)

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