# Write an expression to find the area of a rectangle

The width of the rectangle is four meters. Use a Problem Solving Strategy for Geometry Applications Read the problem and make sure you understand all the words and ideas. We're asked what is the length.

## Area of rectangle formula in maths

Remember the rectangular rug from the beginning of this section. A rectangle has four sides, and four right angles. Draw the figure and label it with the given information. A rectangle has an area of 24 square meters. What is the length of the rectangle? So if we multiply the two side lengths of a rectangle, we get its area. Area of rectangles Video transcript - [Voiceover] The picture has an area of 80 square centimeters. So the length of our rectangle is six, and in this case we're talking about meters, meters. His writing covers science, math and home improvement and design, as well as religion and the oriental healing arts. Eight time 10 equals Example: What are the lengths of the sides of a square with an area of 20 m2? Translate into an equation by writing the appropriate formula or model for the situation. Using the Properties of Rectangles to Solve Problems Learning Outcomes Find perimeter and area of a rectangle given length and width Find dimensions of a rectangle given perimeter and a relationship between length and width A rectangle has four sides and four right angles.

So what we do know though, is that we need our width to be a number that when it's multiplied times 10, we get 80 for an answer. Choose a variable to represent it.

### How to write an expression for the area of a rectangle

So this time we don't even have a picture to look at, but we have enough information up here to solve this. Name what you are looking for. These two quantities are independent, though, so you can't do a reverse calculation and determine both of them if you know only the area. We're told that this distance from here to here, this length is 10 centimeters, so the length is Well, maybe we don't know a special formula or a special equation to find width, but we do know one to find area of a rectangle, so let's use that formula and see how it can help us. How long is it? If you also know the perimeter of the rectangle, you can use that information to find two possible values for length and width. And that number must be six, because six times four equals Knowing the perimeter may not give you a unique answer, but two answers are better than none. We know that area of a rectangle can be found by multiplying the length of the rectangle, over here, the length, times the width. Example: The area of a rectangle is 20 square meters, and its width is 3 meters. His writing covers science, math and home improvement and design, as well as religion and the oriental healing arts. Times the width, we don't know the width.

Times the width, we don't know the width. So that means the width of our picture is eight centimeters.

If you know the area, you can immediately determine the length of each side, because it's the square root of the area.

See the first image.

The sides are labeled L for length and W for width. A rectangle has an area of 24 square meters.

### Area of a rectangle algebraic expression worksheet

So what number times 10 equals 80 is eight. These two quantities are independent, though, so you can't do a reverse calculation and determine both of them if you know only the area. So if we multiply the two side lengths of a rectangle, we get its area. Choose a variable to represent it. Updated April 30, By Chris Deziel If you know the length and width of a rectangle, you can figure out its area. Again, we can use our formula that tells us area of a rectangle is the length times the width. See the first image. If you know the area, you can immediately determine the length of each side, because it's the square root of the area. Area of rectangles Video transcript - [Voiceover] The picture has an area of 80 square centimeters. The sides are labeled L for length and W for width. Eight time 10 equals

Choose a variable to represent that quantity.

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