@prefix concept: <https://w3id.org/kmath/concept/> .
@prefix course: <https://w3id.org/kmath/course/> .
@prefix math: <https://w3id.org/kmath/> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix review_status: <https://w3id.org/kmath/review_status/> .
@prefix scheme: <https://w3id.org/kmath/scheme/> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
@prefix textbook_section: <https://w3id.org/kmath/textbook_section/> .

concept:circumcenter a math:Concept ;
    rdfs:label "삼각형의 외심"@ko ;
    skos:altLabel "외심"@ko ;
    skos:definition "삼각형의 세 변의 수직이등분선의 교점으로, 세 꼭짓점에 이르는 거리가 같아 외접원의 중심이 된다."@ko ;
    skos:editorialNote "2026-09-28 개념 모델 정비에서 2022 개정 교육과정 성취기준을 근거로 추가했다. 도메인 전문가 검토가 필요하다."@ko ;
    skos:inScheme scheme:concepts ;
    skos:prefLabel "circumcenter of a triangle"@en,
        "삼각형의 외심"@ko ;
    skos:topConceptOf scheme:concepts ;
    math:introducedIn course:middle_math ;
    math:requires concept:isosceles_triangle_property,
        concept:triangle_congruence ;
    math:requiresTransitively concept:angle,
        concept:geometric_construction,
        concept:isosceles_triangle_property,
        concept:triangle_congruence ;
    math:reviewStatus review_status:needs_review ;
    math:sourceSection textbook_section:national_curriculum_2022_middle_geometry_measurement ;
    math:taughtIn course:middle_math .