Question

Un trapez isoscel ABCD cu AB//CD,AB<CD,m(BCD)=60 grade,AB=4 cm si BC=6 cm.Calculati baza mare

Answer 1

DUCEM INALTIMEA BM, M APARTINE LUI CD. TR DREPTUNGHIC BMC ARE UNGH MCB DE 60 GRADE => UNGH MBC=30 GRADE=> POTRIVIT TH UNGH 30 GRADE MC=BC/2=3. BAZA MARE CD SE COMPUNE DIN 2*MC+AB=6+4=10. => CD=10