Which equation is not equivalent to

A = 1/2bh

2A=bh
h=2A/b
2b=A/h
b=2A/h

I think it is 2b=A/h. Is this correct?

yes.

2A=Bh

No, the equation 2b = A/h is equivalent to A = 2bh, so it is not the correct answer.

To determine if an equation is equivalent to another, you need to manipulate the given equation algebraically and confirm whether the two equations represent the same relationship. Let's go through each equation and verify if it is equivalent to A = 1/2bh:

1) 2A = bh:

To check equivalence, we can rearrange this equation like so:

2A = bh -> divide both sides by 2:
A = bh/2

We can see that this equation is equivalent to A = 1/2bh, as they are equal after rearranging.

2) h = 2A/b:

Again, we can rearrange this equation:

h = 2A/b -> multiply both sides by b:
bh = 2A

Although this equation is different from the original, it is actually equivalent to A = 1/2bh since both equations state the same relationship between A, b, and h.

3) 2b = A/h:

We can rearrange this equation as follows:

2b = A/h -> divide both sides by 2:
b = A/(2h)

We can see that this equation is equivalent to A = 1/2bh, as they are equal after rearranging.

4) b = 2A/h:

Once again, let's rearrange the equation:

b = 2A/h -> multiply both sides by h:
bh = 2A

Similar to equation (2), this equation represents an equivalent relationship to A = 1/2bh.

Therefore, based on our analysis, all four equations provided are equivalent to A = 1/2bh. So your initial assumption that 2b = A/h is not correct.