Squares: Take two sides and multiply them against each other, ex. 3.5•3.5= the area.
Rectangles: Same as squares. A square is a rectangle.
Circles: Radius times radius times pi equals area.
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To calculate money spent, to make percentages on a pie chart, solve math problems, add fractions, and calculate trajectories.
Math is an important part of your life. Most jobs require you to no math and be able to calculate well.
There are a lot of different things you can calculate with paper. You can calculate many different math equations for example.
No devices use for measuring in math. In math we cannot measure we just calculate.
It means to calculate.