一块三角板，切去其中一角，还有几个角？2B;H5p8m0H)U+}-c5m4O:f/R*\(n
算式：提示;t:v.e;S'S2B;H5p8m0H)U+}-c5m4O:f/R*\(n
答：还有'{.k+{;}:^9D;f1P:[0k7G个角。2B;H5p8m0H)U+}-c5m4O:f/R*\(n