ответ:BE, CF - vysoty
BE = CF = 10 cm
BC = 8 cm
BC=EF=8 cm
AE=FD
AD = AE+EF+FD= 2*AE+EF
rassvktriv treugolnik ABE
S(treug)= ½*BE*AE = ½*10*AE = 5*AE
60 = 5*AE
AE= 60:5 = 12 cm
AD = 2*12+8= 24+8=32 cm
S(trap) = ½ *(BC+AD)*BE = ½ *(8+32)*10 = 5*40 = 200 cm
Объяснение:
ответ:BE, CF - vysoty
BE = CF = 10 cm
BC = 8 cm
BC=EF=8 cm
AE=FD
AD = AE+EF+FD= 2*AE+EF
rassvktriv treugolnik ABE
S(treug)= ½*BE*AE = ½*10*AE = 5*AE
60 = 5*AE
AE= 60:5 = 12 cm
AD = 2*12+8= 24+8=32 cm
S(trap) = ½ *(BC+AD)*BE = ½ *(8+32)*10 = 5*40 = 200 cm
Объяснение: