![]() Rectangle Calculator: Find the Diagonal (d) You can define the diagonal in a rectangle as the piece that connects two vertices in a rectangle that sit opposite each other. Perimeter = 2 x 23 = 46 The rectangle’s perimeter is 46 inches. Using the same dimensions in the previous rectangle (eight-inch length, 15-inch width), you can work out the perimeter of it below. For this example, the length is eight inches, and the width is 15 inches.Ĩ x 15 = 120 inches Rectangle Calculator: Find the Perimeter (P) The formula for working out the perimeter of a rectangle is: An example of this formula in action is below.ġ. The formulas for these are below.ĭiagonal = d² = a² + b² Rectangle Calculator: Find the Area (A) Above, you discovered that the area of a rectangle’s formula is A x B. The formula looks like this:Īrea = A x B Formulas for Rectangles Even though you can use this calculator to work out the area of a rectangle, you can also use it for perimeters and the diagonal of a rectangle. To find the area of a rectangle, you multiply the A side by the B side. ![]() We will also identify the diagonal point through point B to C with a small d. We will give all corners labels A, B, C, and D. ![]() How Do You Find the Area of a Rectangle? We will cover the most important question first: how do you find the area of a rectangle? Below, we’ll explain the formula and the shape.Ī rectangle has four sides and four right angles. It’s also similar to a square (and technically is one) but has two longer sides sitting parallel to each other. You can also define a rectangle as a parallelogram with a right angle. Simply put, it’s a shape with four right angles – a quadrilateral. If knowing how to work out the area of a rectangle has you intrigued, why not use the “ area of a circle” or “ area of a triangle” calculators as well? Definition of a Rectangle: What is a Rectangle? A rectangle has many names but comes from the Latin word rectangulus which means right and straight (rectus) and an angle (angulus). Find out what a rectangle is, a rectangle’s definition and properties, and the formulas for calculating a rectangle’s area. You can cut right to using the tool, which involves inputting the length and width to get the perimeter and area, or you can read on. A calculator that determines the area of a rectangle will become your new best friend. You might want to know your land area, how big your pool is, or if your new rug will fit on your floor. One of the most helpful calculators – and one that you can use in almost any facet of your life – is one that helps you work out the area of a rectangle.
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