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梯形面积的计算 PowerPoint PPT Presentation


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梯形面积的计算. 金山中心学校 葛黎黎. 正方形的面积=边长 × 边长. 长方形的面积=长 × 宽. 平行四边形的面积=底 × 高. 三角形的面积=底 × 高 ÷2. 讨论题 :. 1 、两个完全一样的梯形,拼成了一个什么样的图形?. 2 、拼成的图形的底,相当于原梯形的什么部分?. 3 、拼成的图形的高,相当于原梯形的什么部分?. 4 、每个梯形的面积与拼成的平行四边形的面积有什么关系?. 5 、怎样求梯形的面积?. 填空:. 两个完全一样的梯形可以拼成一个平行四边形。.

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梯形面积的计算

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