The perimeter of the given rectangle is the sum of all its four sides. The given area of any irregular quadrilateral can be calculated by dividing it into triangles.Īns. How do you calculate the area when all the sides are different?Īns. To find the area of a rectangle, multiply its breadth by its length. How do you check if the area of a rectangle is correct?Īns. To calculate the area of rectangle, you must find the area occupied by the rectangle within its perimeter. How do you calculate the area of a rectangle?Īns. What is the formula for area of rectangle? Thus, width of the screen = 160/14 = 11.42 cm Frequently Asked Question (FAQs) The length of a rectangular screen is 14 cm. Length of the blackboard = 140 cm = 1.4 mĪrea of the blackboard = length x breadth = 1.4 m x 0.9m = 1.26 m2 Calculate the area of a rectangular blackboard whose length and breadth are 140 cm and 90 cm, respectively.Īns. Find the area of the rectangle whose length is 14 cm and the width is 3 cm.Īrea of a rectangle = Length × breadth (or Width) Thus, the area of the rectangle = Length x Breadth. We know that ∆ABC and ∆ADC are congruent triangles.Īrea of ∆ABC = 1/2 x base x height = 1/2 x AB x BC = 1/2 x b x lĪrea of ∆ADC = 1/2x base x height = 1/2 x CD x AD = 1/2 x b x lĪrea of rectangle ABCD = Area of ∆ABC + Area of ∆ADC Let the diagonal AC divide the rectangle into two right triangles, i.e., ∆ABC and ∆ADC. Therefore, the rectangle area will equal the sum of the area of these two triangles. The given rectangle diagonal is divided into two equivalent right-angled triangles. Why Area of the rectangle is length x breadth? So, Area of a Rectangle = Breadth (⎷(Diagonal) 2 - (Breadth) 2). Therefore we can write this formula as ⎷((Diagonal) 2 - (Breadth) 2) × Breadth. We know that, formula to calculate the area of a rectangle is Length × Breadth. Now, we can find the diagonal of a rectangle using the Pythagorean theorem. There are two diagonals in a rectangle of the same length.
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