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顺次连接四边形各边中点所得的四边形是什么四边形?对这个问题的探讨有助于学生深刻、全面的认识四边形.为了叙述的简便,我们把顺次连接四边形各边中点所得的
What is the quadrangle of the squares connecting the midpoints of the sides of the quadrilateral? The discussion of this question will help students to fully and fully understand the quadrilateral. For simplicity of the narrative, we connect the midpoints of the sides of the quadrilaterals one by one.