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平面组合图形,五彩缤纷,千变万化。要想求得阴影部分或空白部分的面积,方法各异。解题时,要根据图形的特点,灵话运用所学方法。例1.图1中,正方形EFGH的边长为10厘米,四边形ABCD的面积为6平方厘米,求图中阴影部分的面积。(2013年石家庄市四十一中新初一分班数学试题)
Graphic combination of graphics, colorful, ever-changing. To find the shaded area or a blank part of the area, different ways. Problem-solving, according to the characteristics of graphics, spiritual methods to use what they learned. Example 1. In Figure 1, the side length of a square EFGH is 10 cm, and the area of a quadrilateral ABCD is 6 cm 2. Find the area of the shaded area in the figure. (2013 Shijiazhuang City, the new first division math test)