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Noticemedeyvid
a fost răspuns

aflati masura unghiurilor unui patrulater convex stiind ca sunt: a) direct proportionale cu nr 2,5;21,5 si 3 b) invers prop cu 2/3; 1;2 si 3

Răspuns :

Renatemambouko
A+B+C+D=360°
A/2,5=B/2=C/1,5=D/3 =(A+B+C+D) /(2,5+2+1,5+3)=360°/9=40°
A=2,5×40°=100°
B=2×40°=80°
C=1,5×40°=60°
D=3×40°=120°

A+B+C+D=360°
2A/3=B=2C=3D    B=2A/3   C=2A/6     D=2A/9
A+2A/3+A/3+2A/9=360°
9A+6A+3A+2A=3240°
20A=6840°
A=162°
B=2/3×162°=108°
C=2×162°/6=54°
D=2×162°*9=36°

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