Panjang BE adalah … cm

BC² = AB² – AC²
BC² = 17² – 8²
BC² = 289 – 64
BC² = 225
BC = √225
BC = 15 cm

BE / AB = BD / BC
BE / 17 = 9 / 15
BE / 17 = 3/5
BE = 3/5 x 17
BE = 51/5
BE = 10,2 cm

Dik
(ΔABC)
AB = 17 cm
AC = 8 cm

(ΔBDE)
BD = 9 cm

dit
BE = …?

penyelesaian
|| Mencari BC
BC² = AB² – AC²
BC² = (17 cm)² – (8 cm)²
BC² = 289 cm² – 64 cm²
BC = √225 cm²
BC = 15 cm

|| Mencari BE
BE/AB = BD/BC
BE/ 17 cm = 9 cm/ 15 cm
BE = (9 cm . 17 cm) / 15 cm
BE = 153 cm² / 15 cm
BE = 10,2 cm