Explanation:
Entire circle (2 pi) circumference is pi d = 8 pi
you want 7pi/8 ths of this entire 2 pi circumference
7pi / 8 / (2 pi) * 8pi = 7/2 pi = ~ 11 units
Answer:
Length of arc is 7pi/2
s=r0
s=4×7pi/8
S=7pi/2
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