L=piR*a/180; S(сек)=piR^2*α/360
1)L=pi*14*36/180=2.8pi cм
S=pi*14^2*36/360=19.6pi см^2
2)L=pi*18*108/180=10.8pi мм
S=pi*18^2*108/360=97.2pi мм ^2
3)α=180L/(piR)=180*14pi/(49pi)=360/7≈51.4°
S=pi*49*360/(7*360)=7pi см^2
4)α=360S/(piR^2)=360*42.25pi/(pi*6.5^2)=360°
L=pi*6.5*360/180=13pi м
5)L=pi*0.3*240/180=0.4pi м; S=pi*0.3^2*240/360=0.06pi м^2
L=piR*a/180; S(сек)=piR^2*α/360
1)L=pi*14*36/180=2.8pi cм
S=pi*14^2*36/360=19.6pi см^2
2)L=pi*18*108/180=10.8pi мм
S=pi*18^2*108/360=97.2pi мм ^2
3)α=180L/(piR)=180*14pi/(49pi)=360/7≈51.4°
S=pi*49*360/(7*360)=7pi см^2
4)α=360S/(piR^2)=360*42.25pi/(pi*6.5^2)=360°
L=pi*6.5*360/180=13pi м
5)L=pi*0.3*240/180=0.4pi м; S=pi*0.3^2*240/360=0.06pi м^2