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Q: How to Write an expression for the perimeter of a rectangle with a sides of 3x and 8y?

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Write an equation for the perimeter, and solve it. Remember that the perimeter is the sum of all four sides.

Perimeter = Sum(length of each side), where the summation is over all the sides.

The perimeter of the rectangle is the sum of its 4 sides.

no No. You need to know the length of a rectangle's sides in order to calculate the perimeter.

The perimeter of a rectangle is the sum of its four sides. Perimeter= 2l+2w

The perimeter of a rectangle is the sum of its 4 sides.

To calculate the perimeter, by definition, you must add up all the sides. The details, of course, vary from case to case. For example, if you have an arbitrary triangle, the expression would be something like side1 + side2 + side3 (or whatever the sides are called). In some cases you can simplify the resulting expression; in an isosceles triangle, you have two equal sides, so you get an expression similar to a + a + b = 2a + b. In a rectangle, opposite sides are equal, so you get perimeter = a + b + a + b = 2a + 2b or 2 (a + b).

In order to find the perimeter of a rectangle, you will need to add the measurements of all 4 sides. For a rectangle that is 7m x 6m, you would have two sides that are 7m and two sides that are 6m. That means the perimeter of the rectangle would be 26m.

The perimeter is 40 mm.

You add up all of the sides of the rectangle.

Add up all the sides of the rectangle.

The perimeter of rectangle is the sum of the four sides of a rectangle.

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