Geometry API
Calculate the geometry of common shapes. Get the area of 2D shapes (circle, square, rectangle, triangle — by base/height or three sides via Heron, trapezoid, parallelogram, rhombus, ellipse, regular polygon), the perimeter or circumference, and for 3D shapes the volume and surface area (sphere, cube, box, cylinder, cone, square pyramid). Pass a shape and its dimensions and get back the exact result plus the formula used. Pure local math — no key, no third-party service, instant and deterministic. Live. 6 endpoints. Built for CAD and engineering tools, education and e-learning, construction and material estimation, and any app that needs reliable shape math. Distinct from a generic expression evaluator or unit converter.
api.oanor.com/geometry-api
