How can I find the area of a square?

Check this interactive site.

http://www.mathopenref.com/squarearea.html

how about a rectangle?

http://www.mathopenref.com/rectanglearea.html

Thank you so much. I have another question :) In my Pre Algebra book, I have a question like this:

Draw a line from one vertex to a point on another side to create a triangle. Cut along the line.

What do they exactly mean by 'cut along the line'?

I believe it means to use a pair of scissors and cut on the line you've just drawn from the vertex (corner) to a point on the other side to make a triangle.

oh ok, thank you very much! Also, when finding the area of a shape, the formula is A= bh. But my question is, when you have two different units like w=2ft and h=2yd, which one do I have to choose? Just any of the two?

You can choose either -- but then you must convert the other to the unit you choose.

For instance, for w = 2 ft. and h = 2 yd., I'd choose feet as the unit.

2 yd. = 6 feet.

w = 2 ft. h = 6 ft.

So 1yd would be equal to 3ft?

That's right. :-)

To find the area of a square, you need to know the length of one side. The formula to calculate the area of a square is simply the side length squared. Here's how you can do it:

1. Identify the length of one side of the square. Let's call it "s".

2. Square the length by multiplying it by itself. This can be expressed as s^2.

3. The resulting value is the area of the square. So, the formula to calculate the area of a square is A = s^2, where A represents the area and s is the side length.

For example, if the length of one side of a square is 5 units, you would calculate the area as follows: A = 5^2 = 25 square units.

Remember, the unit of measurement used for the side length will determine the unit of measurement for the area.