tolong jawab 3 soal ini senior

13. Diketahui segitiga siku siku sama kaki
PQ = QR
[tex]pr = \sqrt{pq {}^{2} + qr {}^{2} } \\ pr = \sqrt{ {8}^{2} + {8}^{2} } \\ pr = \sqrt{64 + 64} \\ pr = \sqrt{128} \\ pr = \sqrt{64 } \times \sqrt{2} \\ pr = 8 \sqrt{2} [/tex]