一、创设情境,设疑引思多媒体出示下图:我们学习过平面图形的一些知识。关于这一组图形,你能说出哪些相关的知识?学生说出图形的特点、图形的周长与面积的计算公式等。当说到平行四边形时,在面积的计算这个知识点上,他们产生了疑问。教师引出学习平行四边形面积的计算的课题。 First, the creation of scenarios, set up suspicions cited Multimedia show below: We have learned some knowledge of flat graphics. What do you know about this set of graphics? Students tell us the characteristics of graphics, the formulas for the circumference and area of ​​graphics, and so on. When it comes to parallelograms, they question the area of ​​calculation. The teacher led to the study of calculating the area of ​​the parallelogram.