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[수학체험실] 다각형의 내각의 합과 이등변삼각형의 성질 확인하기
수학동아 2018.12.28 18:07 조회 1102
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페이스북 트위터 카카오톡 카카오스토리 네이버블로그 네이버밴드

 

삼각형의 내각의 합이 180°인 사실에서 더 나아가 사각형의 내각의 합이 360°가 된다는 사실까지 색종이로 확인해 보자. 또 삼각형의 내각의 두 변의 길이가 같은 삼각형을 이등변삼각형이라고 한다. A4용지를 접어 만든 삼각형이 이등변삼각형인지 확인해 보자.

태그
#곡선 삼각형 #직선 삼각형 #색종이로 삼각형의 세 내각의 합 확인하기 #이등변삼각형 여부 확인하기 #볼록한 삼각형과 오목한 삼각형
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