← Asemanarea triunghiurilor
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Teorema lui Thales
In triunghiul
A
B
C
ABC
A
B
C
,
M
∈
A
B
M \in AB
M
∈
A
B
,
N
∈
A
C
N \in AC
N
∈
A
C
,
M
N
∥
B
C
MN \parallel BC
M
N
∥
B
C
. Stiind
A
M
=
x
AM = x
A
M
=
x
,
M
B
=
10
MB = 10
M
B
=
10
si
A
N
N
C
=
3
5
\frac{AN}{NC} = \frac{3}{5}
N
C
A
N
=
5
3
, afla
x
x
x
.
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