Răspunsuri

2014-04-24T22:31:40+03:00
Construiesti inaltimea BM
In ΔBMC, tg C=BM/MC=1,(3)
BM/MC=4/3
8/MC=4/3⇒MC=6
In ΔBMC, aplicam Pitagora ⇒BC²=BM²+MC²⇒BC²=64+36=100
BC=10
B)
A=(AB+DC)*BM/2
In ΔDBC, aplicam th catetei⇒BC²=MC*DC⇒100=6*DC⇒DC=100/6=16,6
DM//AB⇒DM≡AB
DM=DC-MC
DM=16,(6)-6=10,6
A=(10,6+16,6)*8/2=108,8