Geometric Shape Drawer

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Random shapes appear; compute the area mentally. Multiple choice. For middle schoolers.

Education area geometry quiz

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Paste a GeoJSON object and validate its structure. Catch missing coordinates, wrong types, and feature errors. Local.

Developer Tools check GeoJSON geometry validator

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Find the centroid (center of mass) of any convex polygon by entering vertex coordinates. Useful for physics and design.

Calculator calculator centroid geometry polygon

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Draw perfect ellipses by dragging focal points and a point on the curve. See the equation update dynamically. Educational.

Educational drawing ellipse geometry math

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Calculate the area of an irregular polygon by entering its vertex coordinates. Uses the shoelace formula. Pure math.

Calculator area coordinates geometry polygon

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Enter a number of sides (3‑100) and get the correct polygon name (triangle, hectogon). Fun geometry reference.

Educational geometry names polygon reference

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Drag the seven tangram pieces to form a target silhouette. Multiple puzzles. Develop spatial thinking. All canvas interactions.

Educational geometry puzzle shapes tangram

Tag: Geometric Shape Drawer