Question

1.Fie ABC un triunghi dreptunghic in A si AD -I-BC,d apartine BC.
b)daca AD=12cm,BD=9cm,calculati DC.
c)Daca DC =16 cm,BC=25cm,calculati AD si BD.
2.Fie ABC un triunghi dreptunghic in A si AD _I_BC,D apartineBC.
a)Daca BD=0,8m,CD=7,2,calculati AD si BC.
c)Daca BD=3,5cm,BC=35cm,calculati DC si AD.
4.Fie ABC un triunghi dreptunghic in A si AD_I_BC,D apartne BC.
b)Daca AD=6cm,iarBD=4cm,aflati DC.
c)Daca AD=3 radical3 cm,iarDC=3cm,aflati BD.

Answer 1

b)  AD² = BD·DC  ⇒ DC = 16cm
c) BD = BC - DC = 9cm    AD² = BD·DC = 9·16    AD = 12cm
2. a) BC = BD+DC = 8m    AD² = BD·DC = 5,76  AD= 2,4m
c) DC = BC -BD = 31,5cm    AD² = 31,5·3.5
4. b) AD² = BD·DC    DC = AD²/BD
c)  BD = AD²/CD

Answer 2

b)  AD² = BD·DC  ⇒ DC =16:2 16cm
c) BD = BC - DC = 9cm    AD² = BD·DC = 9·16    AD = 12cm
2. a) BC = BD+DC = 8m    AD² = BD·DC = 5,76  AD= 2,4m
c) DC = BC -BD = 31,5cm    AD² = 31,5·3.5
4. b) AD² = BD·DC    DC = AD²/BD
c)  BD = AD²/CD