Answer:
[tex]12 \sqrt{3} [/tex]
Step-by-step explanation:
30 - 60 - 90
side opposite 60 =
[tex]x \sqrt{3} [/tex]
so,
a = 18 or
[tex]18 = x \sqrt{3} \\ x = 6 \sqrt{3} [/tex]
c = 2x