anonymous
  • anonymous
(Confused!!!!!) What is the arc measure of a sector with area 38.485 ft2 and radius 7?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
@jim_thompson5910
jim_thompson5910
  • jim_thompson5910
first use this formula \[\large A = \frac{t}{360}*\pi*r^2\] which is the area of a sector formula
anonymous
  • anonymous
pi*7^2 = 49*pi =~ 153.938

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jim_thompson5910
  • jim_thompson5910
you use this formula to determine the angle t once you know the angle t, you can use it to figure out the arc length
anonymous
  • anonymous
38.485 / (49*pi) =~ 0.25
anonymous
  • anonymous
so 90 degrees ?
jim_thompson5910
  • jim_thompson5910
yeah roughly, nice work so far
jim_thompson5910
  • jim_thompson5910
so t = 90 and r = 7 plug them into \[\large s = \frac{t}{360}*2*\pi*r\]
anonymous
  • anonymous
90/360 * 2 * 3.14 * 7 = I got 175.84
jim_thompson5910
  • jim_thompson5910
I'm getting something way smaller
jim_thompson5910
  • jim_thompson5910
try it again
jim_thompson5910
  • jim_thompson5910
I see where you went wrong, you divided in the wrong order you typed in 360/90 when you should have said 90/360
anonymous
  • anonymous
10.99 ?
jim_thompson5910
  • jim_thompson5910
good
anonymous
  • anonymous
:D

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