How many square metres are in a acre?

Answer 1

You're kidding right?

There is 1 metre in a square metre...hence, 1x1 metre=1^2 metre.

The above is also wrong, there could be said that there are an infinite amount of meters in a square meter or none at all depending on which way you lean philosophically.

The question you ought to ask is: how long is one of the sides of a square meter, in which case the answer is one meter.

Answer 2

There are 1,000,000 square meters in one square kilometer.

Answer 3

1 acre = 4,046.85642 square meters.