你能把下面的平面图形分分类吗?4P'C'c)f-g7K9c3F0X:J7c-G
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三角形+e3L5x0P/u;R8b,[2y-L,b'o9m-S7C*\/t'V6K5W*X'N.[4}5C.4P'C'c)f-g7K9c3F0X:J7c-G
圆5g(N9_7A2a)L/n-\1P;M,E.]5e.4P'C'c)f-g7K9c3F0X:J7c-G
四边形,四个角/],a([/V.^1z/Z2^:k+R5Y;f:`*u6~-x-^5`.L:U,i5r/d0}+k.V3A;_;o-p9_(W8y(K/^4w6k)w.j8A;n.{1~'m4f1]+k6o.4P'C'c)f-g7K9c3F0X:J7c-G
六边形4w8G0\.4P'C'c)f-g7K9c3F0X:J7c-G