berdasarkan gambar diatas panjang AB adalah.....cm

Dik: p = 17 cm
r1 = 10 cm
r2 = 2 cm
Dit : d?
Jawab:
[tex]d = \sqrt{p ^{2} - r1 - r2) ^{2} } \\ = \sqrt{17 ^{2} - (10 - 2) ^{2} } \\ = \sqrt{17 ^{2} - 8 ^{2} } \\ = \sqrt{289 - 64} \\ = \sqrt{225} \\ = 15cm[/tex]