The Clue You can do it side by side?
The Answer AREA
The answer "AREA" fits the clue "You can do it side by side" because an area can be described as a space where things are placed next to each other. When you think of area in geometry, it often involves measuring space in a flat shape, like a rectangle or square, where sides are aligned. Additionally, the phrase "side by side" suggests that two things can occupy the same area together. Thus, "AREA" cleverly connects to the idea of being next to each other.