$$\frac{arc\ length}{8\pi}=\frac{225\degree}{360\degree}$$

$$\frac{arc\ length}{4\pi}=\frac{225\degree}{360\degree}$$

$$\frac{arc\ length}{16\pi}=\frac{225\degree}{360\degree}$$

$$\frac{arc\ length}{8\pi}=\frac{360\degree}{225\degree}$$

$$\frac{arc\ length}{8\pi}=\frac{180\degree}{360\degree}$$

$$\frac{arc\ length}{4\pi}=\frac{180\degree}{360\degree}$$

$$\frac{arc\ length}{16\pi}=\frac{180\degree}{360\degree}$$

$$\frac{arc\ length}{360\degree}=\frac{4\pi}{180\degree}$$

10 pi

225

2.5 pi

5 pi

40

35

55

69

True

False it's 6.8cm

False it's 7.4 cm

12.56

1.80

1.74

1.71

3.31 feet

14.83 feet

5.19 feet

10.39 feet