Răspuns:
a) A=25
B=25*2
C=?
B=25*2=50
A+B+C=180 deoarece triunghiul are 180 grade
25+50+C=180
75+C=180
C=180-75
C=105
b)B=20
C=4*20
A=?
C=4*20=80
A+B+C=180
A+20+80=180
A+100=180
A=80
c) A=14*5=70
70+14+B=180
84+B=180
B=96
