![]() ![]() Want to change the area unit? Simply click on the unit name, and a drop-down list will appear. ![]() Regular polygon area formula: A = n × a² × cot(π/n) / 4.Quadrilateral area formula: A = e × f × sin(angle).Octagon area formula: A = 2 × (1 + √2) × a².Hexagon area formula: A = 3/2 × √3 × a².Pentagon area formula: A = a² × √(25 + 10√5) / 4 The area and perimeter worksheets on this page start with requiring students to calculate area and perimeter of basic shapes such as triangles, squares, circles and ellipses.Trapezoid area formula: A = (a + b) × h / 2.Circle sector area formula: A = r² × angle / 2.Euclidean Geometry refers to the study of plane and solid figures on the basis of axioms (a statement or proposition) and theorems. A = 0.25 × √( (a + b + c) × (-a + b + c) × (a - b + c) × (a + b - c) ) or Hyperbolic Elliptical Euclidean Geometry We study Euclidean geometry to understand the fundamentals of geometry.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. Geometry Shapes Signs Set of 16 Square, Circle, Rectangle, Ellipse Pentagon, Hexagon, Heptagon, Octagon Diamond, Phrombus, Equilateral Triangle, Scalene.
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