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Arc by 3 Points

In one sentence: Draws a circular arc through three clicked points, computing the unique circle that passes through all three.

Overview

Workbench: Draft
Menu: Draft → Drafting → Arc Tools → Arc by 3 Points
Command: Draft_Arc_3Points

FreeCAD computes the unique circle passing through three non-collinear points and shows the arc between the first and third points. Faster than the centre-radius-angle method when you know where the arc must pass.

When to use

  • Fitting an arc through three known survey or layout points.
  • Matching an arc to three snapped geometry positions.
  • When the centre and radius are not known but the pass-through points are.

See also