Cecelol Cecelol
  • 13-02-2018
  • Mathematics
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manandhanteja manandhanteja
  • 13-02-2018
C = 2×pi×r
72 = 2×pi×r

so r = 36/pi

DE = 30deg×36/pi
DE = (pi/6)×(36/pi) = 6cm
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