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Vă rog frumosss


UrgentttttttttttttVă Rog Frumosss class=

Răspuns :

mas ∡O1=60-40=20°
O5 op la varf cu (O1+O2) deci m O5=60°
m O4=180-mO3-mO5=180-90(dat prin semnul specific)-60=30°
mO7=90-mO1=90-20=70°
mO6=180-90-mO2=90-40=50°