QUESTION IMAGE
Question
select the correct answer. the two triangles shown are congruent by the sss criterion. what are the values of x and y? image of two triangles: top triangle has a side labeled 10 (one tick mark), a side labeled 11 (two tick marks), and a side with three tick marks; bottom triangle has a side labeled x+6 (one tick mark), a side labeled 2x+y (two tick marks), and a side with three tick marks. options: x=16 and y=43; x=16 and y=21; x=4 and y=19; x=4 and y=3
Step1: 利用SSS全等,对应边相等。先看含\(x\)的边:\(x + 6 = 10\)?不对,再看,上面三角形的边10和下面的\(x + 6\)?不,重新看,上面三角形的边10(一条),11(一条),还有一条三线;下面三角形的边\(x + 6\)(一线),\(2x + y\)(两线),还有一条三线。所以一线的边相等:\(x + 6 = 10\)?不对,哦,上面三角形的一线边是10,下面的一线边是\(x + 6\)?不,可能我看错了,重新来:全等三角形SSS,对应边相等。上面三角形的边:10(一线),11(两线),三线;下面三角形的边:\(x + 6\)(一线),\(2x + y\)(两线),三线。所以一线边相等:\(x + 6 = 10\)?不对,\(x + 6 = 10\)的话\(x = 4\)。然后两线边相等:\(2x + y = 11\),代入\(x = 4\),得\(8 + y = 11\),\(y = 3\)。对,这样符合选项。
Step1: 一线边相等:\(x + 6 = 10\)
\(x = 10 - 6 = 4\)
Step2: 两线边相等:\(2x + y = 11\)
代入\(x = 4\),\(2\times4 + y = 11\),\(8 + y = 11\),\(y = 11 - 8 = 3\)
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\(x = 4\) and \(y = 3\)(对应选项:x = 4 and y = 3)