Question

Vă rooog pe 6 repedee
Dau coroana !!!!!!

Answer 1

a) AE/EC = 8/4 = 2/1 | 
    AD/DB = 6/3 = 2/1 | ⇒ DE ║ BC

b) AE/AC = 15/30 = 1/2 |
    AD/AB = 10/16 = 5/8 | ⇒ DE ∦ BC

c) AD = AB - BD = 20 - 12 = 6
    AC = AE + EC = 4 + 6 = 10
 
AE/AC = 4/10 = 2/5   |
AD/AB = 6/20 = 3/10 | ⇒ DE ∦ BC

d) AE = AC - EC = 36 - 20 = 16

AE/AC = 16/36 = 4/9  |
AD/AB = 10/24 = 5/12| ⇒ DE ∦ BC