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Please help me with this question

Please help me with this question-example-1
User Landmaster
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Answer:

Explanation:

To determine length of bottom red line use pythagorean/distance

dbottom =
\sqrt{8^(2) +10^(2) } = √(164) = 2√(41) or 12.8

ddiagonal=
\sqrt{8^(2) +10^(2)+ 6^(2) } = √(200) = 2√(10) or 14.14

User Yorimar
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