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
Download CSV
| No. | Type | Item | Value / Verdict | Note |
|---|
Introduction to the tool and how to use it
Online geometry proof helper: enter one point's coordinates per line (or a segment, polygon, or circle); it recognizes the shape automatically and reports side lengths, interior angles, area, and perimeter, then numerically classifies equilateral, isosceles, right, parallelogram, rectangle, rhombus, square, trapezoid, regular polygon, and collinear.
Input format: a point may be
Claim check: in claim, write the statement to verify using shorthand syntax, separated by commas, for example
Precision: everything is judged with floating point plus a relative tolerance (default 1e-6, adjustable decimal places); it never compares floats with ===; angles are always in degrees and marked (°) to avoid confusion with radians. Point cap is 100 and output rows cap at 2000; excess converges silently with a notice.
Input format: a point may be
A(0,0), A = 0,0, or A:0,0; a segment is AB; a polygon is ABCD or square ABCD (vertices in order); a circle is O(0,0) r=2 or center(0,0) r(2).Claim check: in claim, write the statement to verify using shorthand syntax, separated by commas, for example
AB = CD, AB // CD, AB ⊥ CD, angle ABC = 90, A,B,C collinear, triangle ABC is isosceles; the tool answers holds / does not hold for each, with the basis.Precision: everything is judged with floating point plus a relative tolerance (default 1e-6, adjustable decimal places); it never compares floats with ===; angles are always in degrees and marked (°) to avoid confusion with radians. Point cap is 100 and output rows cap at 2000; excess converges silently with a notice.
How to use
- Paste point, segment, polygon, or circle definitions into the input box, one per line.
- Choose the shape mode and point format, enter the claims to verify, and toggle measurements and proof steps as needed.
- Click Run.
- Review the measurements and verdict, then copy or export.
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