The formula for the perimeter of a square is P = 4l, where l is the length of one side of the square.Ī square is a shape that has all four sides that are the same length. To find the perimeter of a square, multiply the length of one side by 4. We can add the two fours to get eight and we can add the two nines to get 18.Ĩ + 18 = 26 cm and so, the perimeter of the rectangle is 26 cm.Īgain we can use the formula to calculate the perimeter of the rectangle more quickly. The length is always the longest side.įinding the perimeter of the rectangle, we add all four sides together. The width is shown below as the two shorter sides. We draw a diagram of the situation to help us visualise it and to mark the lengths on. Here is an example of a word problem for the perimeter of a rectangle. Then mark the length of all sides before adding them together.
To solve word problems with perimeter, first draw the problem to visualise it better. The total distance around the outside of this rectangle is 70 mm. We double this to get the perimeter of 70 mm. We add the length and width and then double it.Ģ0 + 15 = 35 mm. We will use the formula to find the perimeter of this rectangle. Here is another example of finding the perimeter of a rectangle. The formula for the perimeter of a rectangle can alternatively be written as P = 2l + 2w or P = l + l + w + w. Simply add the length and width togther and then multiply the result by 2. The formula for the perimeter of a rectangle is Perimeter = 2 × (length + width).
Since there are two lengths and two widths, we double this to get 10 cm. We can add the length and width together and then double this result because there are two of them.Īdding the length and the width, we have 2 + 3 = 5 cm. There are two lengths and two widths on a rectangle. This is because there are two widths, which are marked below. To find the perimeter of a rectangle, simply add the length and the width together and then multiply this result by 2. There is a quicker method for working out the perimeter of a rectangle when given the length and the width. This means that the total distance around the outside of the shape is 10 cm. Therefore the perimeter of this rectangle is 10 cm. Once the lengths of all of the sides of a shape are labelled, the perimeter can be found by adding these lengths together. If the top side of the rectangle is 3 cm, then so is the bottom side. Therefore if the left side of the rectangle is 2 cm, then so is the right side. The opposite sides of a rectangle are the same length. We are told the length and the width of this rectangle. Here is an example of finding the perimeter of a rectangle when only given 2 of its sides. Here are some of the most common units that perimeter is measured in. It is found by adding up all of the outside lengths of a shape. Perimeter is the total distance around the outside of a shape. Alternatively, add the length and width of the rectangle together and then double this result. To find the perimeter of a rectangle add up the lengths of all four sides.
0 kommentar(er)
