Question

os ângulos internos de um triangulo são alfa beta e gama
determine seus valores em cada caso a seguir:

Answer 1

So somar cada um e igualar a 180° 
a) 80+x+30=180, x= 180-80-30, x= 70°
b) 5x+45+4x=180, 9x=135, x=15
c) 3x-50+x+10+x=180, 5x=180-40,5x=140,x=28
d) 50+x+30=180, x=180-80, x=100
e) 60+x+75=180, x=180-135, x=45
f) 50+65+x=180, x=180-115, x=65
h) 5x+3x+4x=180, 12x=180, x= 15
i) 2x+3x+70=180, 5x=180-70, 5x=110, x=22
j) 6x+2x+x=180, 9x=180, x=20
k) x+x+50+10=180, 2x=180-60, 2x=120, x=60
l) x+50+x+10+x-30=180, 3x=180-30, 3x=150, x=50
m) x+2x+x+20=180, 4x=160, x=40