This question please

asked Aug 27, 2018 178k views

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6 votes

19^2 + x^2 = 21^2

19^2 = 361

21^2= 441

361 + x^2 = 441

x^2 = 441-361 = 80

x = sqrt(80) = 8.944 round to nearest tenth = 8.9

Byeongin Yoon answered Aug 31, 2018

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