Answer
Because the base is equal to the area, (L*W). So essentially, they are the same equation!
Explanation:
We normally find the area when dealing with two-dimensional shapes, correct? So, when the shape becomes 3-dimensional, it now includes a base and a height! You multiply these together to get the volume (the amount of space it takes up).
If we were to add a height to a regular rectangle, what was once the entire shape, now becomes the base of a rectangular prism! The length and the width of that prism is equal to the base, which makes both equations equal to each other!
