Question

va rog, urgent 10 si 11

Answer 1

Unghiurile formate in jurul unui punct au intotdeauna suma masurilor lor egala cu 360°
a)x=y=z
=>360°:3=120°
=>x=y=z=120°
b)x=y
z=3y=3x
x+x+3x=360°
5x=360°
x=72°
y=72°
z=3·72°=216°
c)y=z
x=2y=2z
2z+z+z=360°
4z=360°         
z=90°
y=90°
x=180°
d)x=2y
z=3y
2y+y+3y=360°
6y=360°
y=60°
x=120°
z=180°
e)x=y-40°=2z-40°
y=2z
2z-40°+2z+z=360°
5z-40°=360°
5z=400°
z=80°
y=160°
x=120°