rearrange the formula
[tex]a = \frac{bh}{2} for h[/tex]
A) h= 2ab

b)
[tex]h = \frac{a}{2b} [/tex]
c)
[tex]h = \frac{2a}{b} [/tex]
d)
[tex]h = \frac{2b}{a} [/tex]