Answer:
The answer is h = 2A/(b+c) .
Step-by-step explanation:
You have to move all the unrelated terms to the other side by making h the subject :
[tex]A = \frac{1}{2} (b + c)h[/tex]
[tex]A \div \frac{1}{2} = \frac{1}{2} (b + c)h \div \frac{1}{2} [/tex]
[tex]2A = (b + c)h[/tex]
[tex]2A \div (b + c) = (b + c)h \div (b + c)[/tex]
[tex] \frac{2A}{b + c} =h[/tex]
[tex]h = \frac{2A}{b + c} [/tex]
