三角形的面积公式 =(1/2)*底*高 s=(1/2)*a*b*sinC (C为a,b的夹角) 底*高/2 底X高除2 二分之一的 (两边的三角形的面积公式 (1)S△=1/2ah (a是三角形的底,h是底所对应的高) (2)S△=1/2acsinB=1/2bcsinA=1/2a
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![三角形的面积公式 =(1/2)*底*高 s=(1/2)*a*b*sinC (C为a,b的夹角) 底*高/2 底X高除2 二分之一的 (两边的三角形的面积公式 (1)S△=1/2ah (a是三角形的底,h是底所对应的高) (2)S△=1/2acsinB=1/2bcsinA=1/2a](/uploads/image/z/597955-67-5.jpg?t=%E4%B8%89%E8%A7%92%E5%BD%A2%E7%9A%84%E9%9D%A2%E7%A7%AF%E5%85%AC%E5%BC%8F+%3D%281%2F2%29%2A%E5%BA%95%2A%E9%AB%98+s%3D%281%2F2%29%2Aa%2Ab%2AsinC+%28C%E4%B8%BAa%2Cb%E7%9A%84%E5%A4%B9%E8%A7%92%29+%E5%BA%95%2A%E9%AB%98%2F2+%E5%BA%95X%E9%AB%98%E9%99%A42+%E4%BA%8C%E5%88%86%E4%B9%8B%E4%B8%80%E7%9A%84+%EF%BC%88%E4%B8%A4%E8%BE%B9%E7%9A%84%E4%B8%89%E8%A7%92%E5%BD%A2%E7%9A%84%E9%9D%A2%E7%A7%AF%E5%85%AC%E5%BC%8F+%281%29S%E2%96%B3%3D1%2F2ah+%EF%BC%88a%E6%98%AF%E4%B8%89%E8%A7%92%E5%BD%A2%E7%9A%84%E5%BA%95%2Ch%E6%98%AF%E5%BA%95%E6%89%80%E5%AF%B9%E5%BA%94%E7%9A%84%E9%AB%98%EF%BC%89+%282%29S%E2%96%B3%3D1%2F2acsinB%EF%BC%9D1%2F2bcsinA%EF%BC%9D1%2F2a)
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