Rearrange to make $h$ the subject: \[ A=\frac{1}{2} \times b \times h \]

Step 1 ：Rearrange the formula to make \(h\) the subject: \[A=\frac{1}{2} \times b \times h\]

Step 2 ：Isolate \(h\) on one side of the equation: \[h = \frac{2A}{b}\]

Step 3 ：\(\boxed{h = \frac{2A}{b}}\) is the final answer.