Odpowiedzi

2009-12-16T22:17:22+01:00
P=pi r kwadrat α/360
360P=pi rkwadrat α
rkwadrat= 360P/pi α
rkw.=360*40pi/pi α
r kwadrat= 360
r=18,5 cm
2009-12-16T22:22:55+01:00
Stosunek: 40/360 = 1/9

1/9 P=40πcm^2 //*9
P=360πcm^2
π r^2 = 360πcm^2
r^2=360cm^2
r=√360cm^2
r=6√10 cm
d=12√10cm

Obw= 1/9 * π * 12√10cm
łuk= π*4√10/3