11
Объяснение:
k = A1B1/AB = 3/6 = 1/2
B1C1 = kBC = 9/2 = 4.5
A1C1 = kAC = 7/2 = 3.5
PA1B1C1 = A1B1 + B1C1 + A1C1 = 3 + 3.5 + 4.5 = 6 + 4 + 1 = 11.
11см
k=AB/A1B1=6/3=2
Р(АВС)=АВ+АС+ВС=6+7+9=22см.
Р(А1В1С1)=Р(АВС)/k=22/2=11см.
11
Объяснение:
k = A1B1/AB = 3/6 = 1/2
B1C1 = kBC = 9/2 = 4.5
A1C1 = kAC = 7/2 = 3.5
PA1B1C1 = A1B1 + B1C1 + A1C1 = 3 + 3.5 + 4.5 = 6 + 4 + 1 = 11.
11см
Объяснение:
k=AB/A1B1=6/3=2
Р(АВС)=АВ+АС+ВС=6+7+9=22см.
Р(А1В1С1)=Р(АВС)/k=22/2=11см.