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1:53
[ 중2-2 ] 사다리꼴 평행선 사이의 선분의 길이 비, " 📐 수학의 마법! 삼각형 닮음으로 사다리꼴 선분 EF 구하기 " #수학공부 #개념수학 #중2수학
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6 months ago
YouTube
Marvelous academy
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