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50(st)-x%
x=13,9%
Ob=2*(pi)*r
Ob=20pi
l- dł łuku
l=ob*x%
l=20pi*13,9%
l=8,7
2.
360-100%
72-x%
x=20%
P=pir^2
P=25pi
p- pole wycinka
p=P*x
p=5pi=15,7
50/360x 2x10 pi
50/360 x20pi
2 7/9 pi
b) 50/360x25pi
13 8/9pi
50°-x %
x=13,9%
Ob=2 * π * r
Ob=20 π
l- dł łuku
l=ob * x %
l=20 π *13,9%
l=8,7
2.
360°-100 %
72°-x %
x=20 %
P = π r^2
P = 25 pi
p - pole wycinka
p = P * x
p = 5 π = 15,7