Geometry Calculator
One point per line (A(0,0) / A = 0,0 / A:0,0); segments as AB; polygons as ABCD or square ABCD; circle as O(0,0) r=2
Figure:
Point format:
Measures:
Proof:
Calculation Result
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| No. | Type | Item | Value / Verdict | Note |
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Introduction to the tool and how to use it
An online geometry helper: type one point per line (or a segment, polygon or circle) and it auto-detects the figure, reports sides, interior angles, area and perimeter, then decides numerically whether it is equilateral, isosceles, right, a parallelogram, rectangle, rhombus, square, trapezoid, regular polygon or a set of collinear points.
Input format: write a point as
Claim checking: write the conclusions you want to test in the claim box with the shorthand syntax, separated by commas, for example
Precision: all checks use floating point with a relative tolerance (1e-6 by default, adjustable via the decimals box) instead of strict equality, and every angle is reported in degrees with a ° mark so it cannot be confused with radians. Up to 100 points and 2000 output rows, with silent trimming and a notice beyond that.
Input format: write a point as
A(0,0), A = 0,0 or A:0,0; a segment as AB; a polygon as ABCD or square ABCD (vertices in order); a circle as O(0,0) r=2 or center(0,0) r(2).Claim checking: write the conclusions you want to test in the claim box with the shorthand syntax, separated by commas, for example
AB = CD, AB // CD, AB ⊥ CD, angle ABC = 90, A,B,C collinear or triangle ABC is isosceles; each one gets a true / false verdict with its reasoning.Precision: all checks use floating point with a relative tolerance (1e-6 by default, adjustable via the decimals box) instead of strict equality, and every angle is reported in degrees with a ° mark so it cannot be confused with radians. Up to 100 points and 2000 output rows, with silent trimming and a notice beyond that.
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