【题目】如图4所示的图案,将它作为一个游戏盘,游戏规则是:按一定距离向盘中投镖一次,扎在黑色区域为甲胜,扎在白色区域为乙胜.你认为这个游戏公平吗?为什么?【解答】这个游戏公平.根据图形的特征可以发现这个图形是轴对称图形(颜色除外).过圆心的竖线是其中一条对称轴,对称轴两旁的部分能够完全重合.这条对称轴两旁的所有黑色区域正好和另一旁的白色区域互相重合在一起.根据轴对称图形的知识可知这些重合的图形面积 [Title] as shown in Figure 4 as a game, as a game of the game, the rules of the game: a certain distance to the dart in the disk once, tie in the black area for the victory, tie in the white area for the B wins. The game is fair? [Answer] This game is fair. According to the characteristics of the graph you can see that the graph is an axisymmetric graph (except for color). The vertical axis of the center of the circle is one of the symmetry axes and the two sides of the axis of symmetry can completely coincide .All black areas on both sides of this axis of symmetry coincide with the white areas on the other side.According to the knowledge of axisymmetric graphics,