Respuesta :

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]