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【OG20-P280-322题】
In the figure above, ifA, B, and C are the areas, respectively, of the three nonoverlapping regions formed by the intersection of two circles of equal area, what is the value of B+C?
1.A+2B+C=24
2.A+C=18 and B=3
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题中已知 A=C。
结合条件 1 或者条件 2 都可以求出 B+C。
1.A+2B+C=24,把 A 干掉,替换成 C: 2C + 2B = 24。C+B=12
2.A+C=18 and B=3。2C = 18,C=9。所以 C+B = 12
题目讨论 (10条评论)

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Crystal8
看漏了信息,两个圆大小一样
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0 回复 2021-11-20 14:11:44
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朋友醒醒
if A, B, and C are the areas, respectively, of the three nonoverlapping regions formed by the intersection of two circles of equal area,意思说两个交叠的圆是相等的,所以A.C相等
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0 回复 2021-09-09 16:15:11
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如果有时间的话我也能做对
根据条件一,既然两边面积相等,而B被算了两次,那单次B+C的面积就是两次B+A+C的一半:12
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0 回复 2021-08-01 11:46:05
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Lori88
看漏了equal area。
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0 回复 2021-07-02 22:51:10
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301282vcdeh
以为a和c包括b了的是不是只有我一个人。。。。
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0 回复 2021-02-21 18:18:10
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Jeaninla
好好审题 ifA, B, and C are the areas, respectively, of the three nonoverlapping regions formed by the intersection of two circles of equal area
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0 回复 2021-02-11 02:16:53
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185901alah
in the figure above 要有图才行吧 不然没法判断是相交的部分是B还是剩下的部分是B
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0 回复 2020-08-21 20:34:25
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326636xqjg回复185901alah
nonoverlapping regions 看清楚题
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0 回复 2021-02-03 17:36:29
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你这只猪
不知道上次为什么会做错,已经忘记了,哈哈
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0 回复 2020-06-28 10:15:25
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emily666
漏看了equal area。。。
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0 回复 2020-05-11 14:47:44
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700+是我的幸运数字
equal area;A=C.....A+B=B+C,SO B+C=24/2......
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0 回复 2020-02-01 10:26:38