anonymous
  • anonymous
ANY1 HELP ME PLEASE The ratio of the radii of two circles at the centers of which two arcs of the same length subtended a angles of 60 degree and 70 degree is
Mathematics
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jamiebookeater
  • jamiebookeater
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watchmath
  • watchmath
arc 1 =\(60/360\cdot 2\pi r_1\) arc 2 = \(70/360\cdot 2\pi r_2\) Since arc 1=arc 2 if we divide the first by the second we have \(1=6/7\cdot r_1/r_2\) So \(r_1/r_2=7/6\) where r1 is the outer radius and r2 is the inner radius
anonymous
  • anonymous
YES BUT IT IS NOT THE OPTION SO I SHOULD THINK THAT THE QUESTION IS WRONG
watchmath
  • watchmath
what are the options?

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anonymous
  • anonymous
A) 5:4 B) 4:5 C) 2:6 D) 4:3
myininaya
  • myininaya
ok i don't mean to sound like a retard but can you tell me what subtended means
anonymous
  • anonymous
extend opposite angle: to be opposite and delimit the extent of an angle or side of a geometric figure was not found in the English Dictionary .
anonymous
  • anonymous
Subtended is a code word to let you know they are referring to a sector of a circle; they would usually say the subtended angle; referring to the sector bounded by radii, arc and subtended angle.

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