2D geometry Calculators

Area Calculator Find the area of sixteen common shapes with this intuitive area calculator! Area of a Rectangle Calculator Area of a rectangle calculator finds the area, perimeter, and diagonal of a rectangle. Area of Crescent Calculator This calculator helps you to find the area for crescents and lunes. These shapes consists of two circular arcs and are determined based on their radii and the distance between the circle centers. Center of Mass Calculator Find the center of mass for your particle system with this center of mass calculator. Centroid Calculator If you're wondering how to find the centroid of a triangle or any other shape, look no further – this awesome centroid calculator is here for you. Chord Length Calculator The chord length calculator computes the length of a chord of a circle based on chord height or central angle, and radius. Cross-Sectional Area Calculator Determine the area of cross-section for beams using the cross-sectional area calculator. Ellipse Calculator Ellipse calculator finds all the parameters of an ellipse – its area, perimeter, and eccentricity, as well as the coordinates of the center, foci, and vertices. Golden Rectangle Calculator Golden rectangle calculator determines the missing side and area of a golden rectangle. Hexagon Calculator The hexagon calculator finds all the geometrical properties of a regular hexagon. Octagon Calculator If you want to find the area, perimeter, diagonals, circumradius, and inradius of a regular octagon, come in and use the octagon calculator. Orthocenter Calculator With this orthocenter calculator you'll quickly find out the coordinates of this important triangle center. Pentagon Calculator What's the pentagon definition? How many sides does a pentagon have? Find the answers with our pentagon calculator! Perimeter Calculator Find the perimeter of 12 popular shapes with this intuitive perimeter calculator - quick, accurate, and user-friendly! Polygon Calculator Find essential properties of regular polygons, from triangles to decagons, with our comprehensive calculator. Quadrilateral Calculator Find the area of any quadrilateral - even an irregular one - with our quadrilateral area calculator. Quiz: Area of a Rectangle Calculator Test your rectangle math with a set of quick, hands-on calculations. Segment Addition Postulate Calculator The segment addition postulate calculator helps you add the lengths of connected segments on a line, and also determine if a point lies within a line segment. Segment Area Calculator With our segment area calculator you can find area of a segment given the central angle or segment height. Square Calc: find A, P, d This square calc finds a (area), p (perimeter) and d (diagonal) of a square. Star Shape Calculator Discover the geometry of star polygons with our star shape calculator! Trapezoid Calculator The trapezoid calculator is here to give you all the information about your trapezoid shape – the sides, height, angles, area, and perimeter.