Answer:
Because triangle just used to help.
P.S. I’m not sure whether I answer your question
AC, AB, BC
Step-by-step explanation:
3x-13+2x-20+x+15=180
6x-18=180
6x=198
x=33
<a 86
<b 46
<c48
30
10b/a
b = 6
a =2
10(6)/2
10x6 / 2 = 60/2
= 30
3.9375
