hitunglah nilai x,y,dan z berdasarkan gambar berikut

17a
x=120÷60×22=44

y=r
K=2 r π
2(44+22)=2 r 22/7
176= 2 r 22/7
56= 2 r
r= 28
y=28

17b
z=18/12×80
z=120

x=(180-120)×12/80
x=60×12/80
x=9

17c
y=108/90×10
y=12

x=(180-108)/90×10
x=72/9
x=8