Question

35 puncte si coroana pentru cele 2 exercitii !! ​

Answer 1

Răspuns:

1.

a)m(<ABD)=m(<EBC)=38° (opuse la vârf)

=> m(<ABE)=m(<DBC)=(360°-2•38°)/2=142°

b)m(<ABE)=m(<DBC)=103°

=>m(<ABD)=m(<EBC)=(360°-2•103°)/2=77°

c)m(<ABD)=m(<EBC)=52°30'

=>m(<ABE)=m(<DBC)=(360°-2•52°30')/2=127°30'

d)m(<ABE)=m(<DBC)=144°56'30"

=>m(<ABD)=m(<EBC)=(360°-2•144°56'30")/2=(359°60'-289°13')/2=70°47'/2=35°23'30"

2.

a)m(<CFE)=46°=m(<BFA)

=>m(<BFC)=m(<AFE)=(360°-2•46°)/2=134°

m(<AFD)=134°+23°=157°

b)m(<CFE)=m(<BFA)=30°

m(<DFE)=m(<CFD)=15°

=>m(<AFE)=m(<BFC)=(360°-2•30°)/2=150°

m(<BFD)=150°+15°=165°

c)m(<AFE)=m(<BFC)=143°

=>m(<CFE)=m(<BFA)=(360°-2•143°)/2=37°

m(<EFD)=37°/2=18°30'

m(<BFD)=143°+18°30'=161°30'