Răspuns:
a
x+10+x=90
2x+10=90
2x=90-10
x=80:2
x=40grade
x+10=40+10=50grade
b
80-x=180-(90+52)
80-x=180-142
80-x=48grade
c
x+16+2x+14=90
3x+30=90
3x=90-30
3x=60
3x=60:3
x=20grade
x+16=20+16=36grade
2x+14=2*20+14=54grade
d
2x+x=90
3x=90
x=90:3
x=30grade
2x=2*30=60grade
am luat in considerare numai 90 de grade deoarece toate sunt triunghiuri dreptunghice
90+90=180grade cat are un triunghi
Explicație pas cu pas:
