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Sagot :
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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