Rectangle

https://geometry.openverbs.com/v1/circle

Diameter, circumference and area of a circle from its radius.

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https://geometry.openverbs.com/v1/distance

Euclidean, Manhattan and Chebyshev distance between two 2-D points.

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https://geometry.openverbs.com/v1/polygon

Area (shoelace formula), perimeter and centroid of a simple polygon given its vertices in order. Vertices are treated as a closed ring (last connects to first).

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https://geometry.openverbs.com/v1/rectangle

Area, perimeter and diagonal of a rectangle from its width and height.

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https://geometry.openverbs.com/v1/triangle

Area (Heron's formula), perimeter and interior angles of a triangle from its three side lengths. Sides that violate the triangle inequality are rejected as a clean 400.

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