In this formula, 'A' means 'area,' 'L' means 'length' and 'W' means 'width.' You find the area of the rectangle by multiplying its length by its width. Need to find the area of a rectangle? Here's how you write the formula: Tip: 'To the second power' means 'the number multiplied by itself.' For example, four to the second power equals 16 (4^2 = 16) because four times four equals 16 (4 x 4 = 16). For example, if the square's sides are each three centimeters long, its area is equal to three centimeters to the second power, or nine square centimeters. The value of 's^2' is equal to the length of one side to the second power. In this formula, 'A' represents the square's area and 's' represents the length of one of the square's sides. Here is the formula you'll use to find the area of a square: Remember, area is the amount of 2-dimensional space covered by a shape. That's why we multiplied two times five and two times three first, and then added the resulting numbers together. Tip: The order of operations tells us to multiply before adding when we simplify expressions. If you solve this equation, you'll find that this rectangle's perimeter is 16 meters. For example, if L = 5 meters and W = 3 meters, then the equation would be P = (2 x 5) + (2 x 3). This formula tells you to multiply the length by two and the width by two, and then add those results together. In this formula, 'P' represents the perimeter of the rectangle, 'L' represents the length of one of the long sides of the rectangle and 'W' represents the width of one of the short sides of the rectangle. To find the perimeter of a rectangle, you use this formula: Rectangles have two longer parallel sides and two shorter parallel sides. Tip: In math equations, you'll often see a number right next to a letter, like '4s.' When you see this, you multiply the number and the value of the letter together. If the length of one side is five inches, you would multiply five times four to get a perimeter (or 'P') of 20 inches (5 x 4 = 20). The term '4s' tells you to multiply the length of one of the square's sides by four. 'P' represents the perimeter, and 's' represents the length of a side. The formula for finding the perimeter of a square can be written like this: Squares are shapes with four equal sides. For example, if you wanted to know how big a park or a football field was, you would measure its area.īasic Geometry Formulas Explained Perimeter of a Square The area is all of the space inside a 2-dimensional, or flat, shape. Other geometry formulas are used to figure out the area of shapes. For circles, the perimeter is called its circumference. If a shape has sides that are all straight lines, you can find its perimeter by adding the lengths of the sides together. For example, if you measured the distance all the way around the block you live on, that distance would be your block's perimeter. Some geometry formulas are used to find a shape's perimeter, which is the distance around the outside of the shape. Geometry problems often give you information about a shape, like how tall or wide it is, and then ask you to put that information into the correct formula to find the right answer. In geometry, you'll use formulas, which are also called equations, to solve problems.
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