Question

Monica

求解謝謝

UZ VIBC Tours
BK
D
15
D
5. 如{ / |, \4 BC' ||, BD是ABC'的角平分線,
DE IBC ELAB =9, BC = 15 · DE=8
川ABC的面積為
C
B
E
F
E
6.如有問, AD平分∠BAC, DE、DF分別垂直於AB、AC,
C = 15,AABC的面積爲81,