It is calculated by find the product of the length and breadth (width) of the rectangular-shaped and is expressed in square units. The perimeter is 46cm which matches the information given in the question. The area of a rectangle is and distance engaged within the limitation of the rectangle. P 2(l + b) P 2 ( l + b) Area of Rectangle Formula. If you know the area and either the length or the width, the missing value can be found by dividing the area by the. Thus, the perimeter and the rectangle area is given by: The Perimeter of Rectangle Formula. Is my solution correct?Ĭheck the answer by calculating the perimeter of the rectangle. The area of a rectangle is calculated in units by multiplying the breadth (or width) by the length of a rectangle.
If we know two sides of the rectangle that are different lengths, then we have both the height and the width. If \(x = 4\) then \(3 \times 4 - 2 = 10cm\). To find the area of a rectangle, multiply its width by its height. The width of the rectangle is: \(3x - 2\) The length of the rectangle is: \(2x + 5\) The perimeter of the rectangle is 46 cm, therefore:įind the length and width of the rectangle by substituting the value of \(x\) into the expressions for the length and width. The perimeter of a shape is found by adding up all the sides. Write on the lengths ( expressions ) of the other sides on your diagram. What information don’t I need?Įverything in this question is relevant to working out the answer. The answer might be a whole number or a fraction or decimal. The question asks to find the length and width of the rectangle, and to do this you have to find the value of \(x\). The key word in the question is perimeter. If you know the lengths of all sides ( a, b, and c) of a triangle, you can compute its area: Calculate half of the perimeter (a + b + c). The highlighted words are the most important ones. Highlight or underline the important pieces of information in the question. įind the length and width of the rectangle 1. The width of the rectangle is \(3x - 2\). Calculate the cost of painting the wall at a rate of 5 dollars per sq. Therefore, Area of the rectangle length x width Area of the rectangle 14 x 10 140 cm² Example 3: A rectangular wall’s length and width are 40 m and 25 m, respectively. The length of the rectangle is \(2x + 5\). We know that the area of a rectangle can be calculated by its length multiplied by its width.
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