$\square=27$  $\angle=28$  $\triangle=40$ 
Suppose $5\times8=\triangle$, $4\times7=\angle$, $3\times9=\square$. Arrange the three shapes according to their values from smallest to largest. 
Options:
  $\angle$ $\triangle$ $\square$ 
  $\square$ $\angle$ $\triangle$ 
  $\triangle$ $\angle$ $\square$ 
  $\triangle$ $\square$ $\angle$ 
  $\square$ $\triangle$ $\angle$ 