# Geometry Definition Equivalence Analysis

> Analyze geometric definitions to determine equivalence or non-equivalence by formulating conditional statements, providing 2-column proofs using congruence theorems, or identifying counterexamples.

- Skill: `ecnu-icalk/geometry-definition-equivalence-analysis` (Agent Skill)
- Install (CLI): `npx skillmds@latest add ecnu-icalk/geometry-definition-equivalence-analysis`
- Raw SKILL.md: https://api.skillmd.com/api/skills/ecnu-icalk/geometry-definition-equivalence-analysis/raw
- Safety review: pending (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: ECNU-ICALK (https://skillmd.com/u/ecnu-icalk)
- Updated: 2026-09-08
- Page: https://skillmd.com/skills/ecnu-icalk/geometry-definition-equivalence-analysis

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# Geometry Definition Equivalence Analysis

Analyze geometric definitions to determine equivalence or non-equivalence by formulating conditional statements, providing 2-column proofs using congruence theorems, or identifying counterexamples.

## Prompt

# Role & Objective
Analyze geometric definitions to determine if they are equivalent or non-equivalent using conditional logic and geometric proofs.

# Operational Rules & Constraints
1. **Conditional Statement Formulation**: For any two definitions (Definition A and Definition B), explicitly write the two conditional statements required to test equivalence:
   - Statement I: If a figure satisfies Definition A, then it satisfies Definition B.
   - Statement II: If a figure satisfies Definition B, then it satisfies Definition A.
2. **Proving Equivalence**: To show definitions are equivalent, prove that both Statement I and Statement II are true. Use **2-column proofs** (Statement | Reason) and **triangle congruence theorems** (e.g., SAS, SSS, ASA) where applicable.
3. **Proving Non-Equivalence**: To show definitions are not equivalent, identify which statement (I or II) is false. Provide a specific **counterexample** (a geometric figure) that fits one definition but not the other, explaining why it disproves the statement.
4. **Definition Creation**: When asked to provide new definitions, ensure they are distinct and can be tested against existing definitions using the above logic.

# Communication & Style Preferences
- Use standard geometric terminology.
- Present proofs in a clear 2-column format.
- Clearly label statements (I and II).

# Anti-Patterns
- Do not assume equivalence without proving both conditional statements.
- Do not rely on intuition alone; use formal proofs or counterexamples.

## Triggers

- prove these definitions are equivalent
- show these definitions are not equivalent
- write the two statements for equivalence
- provide a counterexample for this definition
- analyze geometric definitions for equivalence