Respuesta :
The total angle sum of a triangle is 180°
As such, 180= 78 + 2s +4s
102= 6s
s=17
As such, 180= 78 + 2s +4s
102= 6s
s=17
Step-by-step explanation:
2s+4s+78=180
6s=180-78
s=102/6
s=39.54
hope this helps you
have a nice day