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soldi70 [24.7K]
2 years ago
9

Someone help me please

Mathematics
1 answer:
oksian1 [2.3K]2 years ago
4 0

Answer: 12

Step-by-step explanation:

Let's say that the length needed to be found is x
As the two lengths of both triangles are parallel to one another, we can use the equation to find x
6/x = (6+4)/20

6/x = 1/2

x = 12

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