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aleksklad [387]
3 years ago
10

Need answered immediately. Right now

Mathematics
1 answer:
HACTEHA [7]3 years ago
6 0
Apply the Pythagorean theorem:
{a}^{2}  +  {b}^{2}  = c ^{2}
{c}^{2}  =  {20}^{2}  +{21}^{2}  \\  {c }^{2}  = 400 + 441 \\  {c}^{2}  = 841 \\  \sqrt{ {c}^{2} }  =  \sqrt{841} \\ c = 29

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If this is a homework question, just paraphrase!

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