Permisi, boleh minta bantuannya?

Permisi, boleh minta bantuannya?

$QS = sqrt{ {QR}^{2} } + {RS}^{2}$

$QS = sqrt{ {8}^{2} } + {12}^{2}$

$QS = sqrt{ {64} } + {144}$

$QS = sqrt{ 208}$

$QS = 4sqrt{13}$

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$QN = sqrt{ {QS}^{2} } + {NS}^{2}$

$QN = sqrt{ { 4sqrt{13} }^{2} } + {5}^{2}$

$QN = sqrt{ {208} } + {25}$

$QN = sqrt {233}$

$QN = 15.26$