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你认识平行四边形吗?这是我今天在数学课堂上认识的新朋度,它是两组对边分别平行且相等的四边形,容易变形。快下课时,数学老师布置了一个特殊的家庭作业:平行四边形是轴对称图形吗?你会证明吗?我的第一感觉是平行四边形是对称图形。于是我在课堂上就
Do you know the parallelogram? This is my new acquaintance today in the math class. It is a set of two quadrangles that are parallel and equal to each other and are easily deformed. Shortly after class, the maths teacher set up a special homework: parallelogram is axisymmetric graphics? You will prove that? My first impression is that the parallelogram is a symmetrical figure. So I was in class