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QUESTION IMAGE

select the correct answer. the two triangles shown are congruent by the…

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

Explanation:

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\(x = 4\),\(2\times4 + y = 11\),\(8 + y = 11\),\(y = 11 - 8 = 3\)

Answer:

\(x = 4\) and \(y = 3\)(对应选项:x = 4 and y = 3)