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Verified answer
Kesebangunan dan KekongruenanPakai rumus kesebangunan , spt perbandingan.
12/ (12+5) = 10/PR
12/17 = 10/PR
17 × 10 = 12PR
PR = 17×10/12
PR = 14,16666
PR ≈ 14,2 cm
Verified answer
Mapel : MatematikaKelas : IX SMP
Bab : Kesebangunan dan Kekongruenan
Pembahasan :
Konsep Kesebangunan
10/PR = 12/(12 + 5)
10/PR = 12/17
17.10 = 12PR
12PR = 170
PR = 14,1 cm