Question

Find the length of YXZ.
A.s=3
B.s=60
C.s=75
D.s=236

Answer 1

r = 15

The circumference of circle:
`C=2\pi r`

subtitute:
`C=2\pi\cdot15=30\pi`


`1\ rad=(180^o)/(\pi)\to5\ rad=5\cdot(180^o)/(\pi)=(900^o)/(\pi)`


`(5\ rad)/(360^o)=((900^o)/(\pi))/(360^o)=(900^o)/(\pi)\cdot(1)/(360^o)=(5)/(2\pi)`


`s=(5)/(2\pi)C\to s=(5)/(2\pi)\cdot30\pi=75`

Answer: C. s = 75