(√10)/(√3)*(√3)/(<span>√3); multiplied by the conjugate which is = (</span><span>√30/3)</span>
72°
the sum of the exterior angles of a polygon = 360°
for a pentagon with 5 sides the
exterior angle = = 72°
Ratio AC to BC = 12/9
simply 12/9 = 4/3
answer is 4/3 (third choice)