Question

Fiona Tseng

求解 謝謝

(A(13)
613 如附圖△ABC中, DG // BC,AD: BD =
2:3, BH HI: IC=3:4:5, EF : BC = ?
A
Due
B
D
EF
HI
(A)2:15, (B)4:15 (C)1:3 (D)2:5

Answer 1

✨ 最佳解答 ✨

Mer

令BH = 3x，HI = 4x，CI = 5x
DE//BH => AE : AH = AD : AB = 2:5
EF//HI => 2:5 = EF : 4x
EF = (8/5)x
EF : BC = (8/5):12 = 2:15