![]() ![]() Want to change the area unit? Simply click on the unit name, and a drop-down list will appear. The area of the rectangle is: A l×w 24×10 240. Using the Pythagorean theorem: w 2 + 24 2 26 2. The diagonal of a rectangle divides it into two congruent right triangles. Regular polygon area formula: A = n × a² × cot(π/n) / 4 Since the area of a rectangle is a product of its length and width, we need to find the width.Quadrilateral area formula: A = 1/2 × e × f × sin(angle).Octagon area formula: A = 2 × (1 + √2) × a².Hexagon area formula: A = 3/2 × √3 × a² The formula for the area of a sector is (angle / 360) x x radius, but the diameter of the circle is d 2 x r, so another way to write it is (angle / 360) 2 x x (diameter / 2).Trapezoid area formula: A = (a + b) × h / 2.Circle sector area formula: A = r² × angle / 2.Apply formula to calculate rectangle area i.e. Here, the width is not given, so we use the Pythagorean theorem to determine the width. Store it in two different variables say length and width. Find the area of a rectangle with a length of 12 cm and a diagonal of 13 cm. So if we substitute the values of the length and width into this equation, we get: A 2 7 3 + 2 7 5 + 2 3 5 42 + 70 + 30 142. where l is the length, w is the width, and h is the height of the box. A = a² × sin(β) × sin(γ) / (2 × sin(β + γ)) Below is the step by step descriptive logic to find area of rectangle. The surface area of the box is: A 2 l w + 2 l h + 2 w h.For the sake of clarity, we'll list the equations only - their images, explanations and derivations may be found in the separate paragraphs below (and also in tools dedicated to each specific shape).Īre you ready? Here are the most important and useful area formulas for sixteen geometric shapes: Well, of course, it depends on the shape! Below you'll find formulas for all sixteen shapes featured in our area calculator. ![]()
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