1)S=ПR2/180 * 30=52,3
2)S=235,5
3)S=366,3
±S∆
1) 3.14*100*30: 360-25=1.18
2)3.14*100*135:360-35.36=82.45
3) 3.14*100*210:360+25=208.26
1)S=ПR2/180 * 30=52,3
2)S=235,5
3)S=366,3
±S∆
1) 3.14*100*30: 360-25=1.18
2)3.14*100*135:360-35.36=82.45
3) 3.14*100*210:360+25=208.26