Perhatikan bahwa segitiga PSR sebangun segitiga PRQ. PR : PQ = PS : PR ↔ 12 : PQ = PS : 12 ↔ PQ = 12 × 12 : PS = 144/PS Perhatikan bahwa segitiga RSQ sebangun segitiga PRQ RQ : PQ = SQ : RQ ↔ 5 : PQ = (PQ – PS) : 5 ↔ PQ(PQ – PS) = 25 ↔ PQ2 – PQ×PS = 25 ↔ (144/PS)² – (144/PS)×PS = 25 ↔ 144²/PS² – 144 = 25 ↔ 20.736/PS² = 25 + 144 ↔ 20.736/PS² = 169 ↔ PS² = 20.736/169 = 122,7 ↔ PS = √122,7 = 11,08 Jadi, panjang PS = 11,08
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Perhatikan bahwa segitiga PSR sebangun segitiga PRQ.
PR : PQ = PS : PR
↔ 12 : PQ = PS : 12
↔ PQ = 12 × 12 : PS = 144/PS
Perhatikan bahwa segitiga RSQ sebangun segitiga PRQ
RQ : PQ = SQ : RQ
↔ 5 : PQ = (PQ – PS) : 5
↔ PQ(PQ – PS) = 25
↔ PQ2 – PQ×PS = 25
↔ (144/PS)² – (144/PS)×PS = 25
↔ 144²/PS² – 144 = 25
↔ 20.736/PS² = 25 + 144
↔ 20.736/PS² = 169
↔ PS² = 20.736/169 = 122,7
↔ PS = √122,7 = 11,08
Jadi, panjang PS = 11,08