Source: https://guthlabs.ai/docs/instruments/geometry-solver-triangle/qualification/

instrument qualification / verified-with-binding-errata

# Geometry Solver — Triangle qualification

Verified with errata that must be applied at binding time.

Status: **VERIFIED_WITH_ERRATA**Lifecycle: **verified-with-binding-errata**

## Ledger verdict

Verified with errata that must be applied at binding time.

**Status**: VERIFIED_WITH_ERRATA

**Tranche**: tranche-4

**Review vectors**: 4

**Ledger rows**: 1

## Applied errata

````
[
  {
    "vector": 1,
    "field": "circumradius",
    "wrong": "2 cm",
    "correct": "2.5 cm",
    "cause": "working writes 60/24=2 (true 2.5)"
  },
  {
    "vector": 2,
    "field": "angles.A/B numeric",
    "wrong": "A≈43.945°, B≈76.055°",
    "correct": "A≈43.898°, B≈76.102°",
    "cause": "symbolic arccos(9/(2√39)) correct; numeric evaluation slipped"
  }
]
````

## Adversarial re-test context

The full catalog was re-tested from boundary, convention, and self-check angles in 2,787 requests. Five genuine computational defects were independently verified and corrected. This page reports the current ledger state for this instrument; it does not imply product deployment or interface qualification.

## Release gate

Bind every attached correction, replay the affected vectors, enforce boundary validation, and preserve evidence before describing the executable surface as qualified.

## Other records

[01**Overview**](<https://guthlabs.ai/docs/instruments/geometry-solver-triangle/>)[02**Mechanism**](<https://guthlabs.ai/docs/instruments/geometry-solver-triangle/mechanism/>)[03**Implementation**](<https://guthlabs.ai/docs/instruments/geometry-solver-triangle/implementation/>)

## Sources and evidence

These pointers bind the page to evidence. They do not grant authority or collapse verification into deployment.

- `VERIFIED_LEDGER.json`

- `STRESS_TEST_RECEIPT.json`

- `tranche errata record`