Răspuns :
triunghiul REP congruent cu triunghiul RQF
⇒m(∡ERP)=(m(∡FRQ)=37°25'.
⇒ m(∡ERF)=180°-37°25' ×2=179°60'-74°50'=115°10'
⇒m(∡ERP)=(m(∡FRQ)=37°25'.
⇒ m(∡ERF)=180°-37°25' ×2=179°60'-74°50'=115°10'