Answer:
Step-by-step explanation:
[tex]A=\frac{1}{2}bh\\[/tex]
Multiply both side by 2
[tex]2*A=2*\frac{1}{2}bh\\\\2A=bh[/tex]
Now, divide both sides by 'h'
[tex]\frac{2A}{h}=\frac{bh}{h}\\\\\frac{2A}{h}=b\\\\b=\frac{2A}{h}[/tex]
