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Answer :

Answer:

9) 14π cm

11)  7π cm

Step-by-step explanation:

9) 2π * 8 * 315/360 = 14π cm

11) 2π * 14 * (π/2)/(2π) = 7π cm

We need length of arc

#9

  • Ø=360-315=45°

So

L=

  • 45/180×π(8)
  • 1/4×8π
  • 2πcm

#11

  • L=Ø/180×πr

L

  • 90/180×π(14)
  • 14π/2
  • 7πcm

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