Answer:
C
Step-by-step explanation:
3x+4x-19+3x-1=180
10x=180+19
x = 199/10 = 19 (round to 20)
x = 20
<A= 20
<B= 80-19= 61
<C=. 59
The longest side is across from the largest angle. Draw the triangle ABC.
AC is across <C (the largest angle)
