Question

Find a lengthy search. Do not round. Part 1. NO LINKS!! ​

Answer 1

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

Answer 2

9) 14π cm

11) 7π cm

Explanation:

9) 2π * 8 * 315/360 = 14π cm

11) 2π * 14 * (π/2)/(2π) = 7π cm