Math, asked by nancy142004, 10 months ago

prove the converse of BPT ​

Answers

Answered by sudhirhaldkar2980
2

Answer:

State and prove converse of BPT.

Statement : If a line divide any two sides of a triangle (Δ) in the same ration, then the line must be parallel (||) to third side.

Given in ΔABC, D and E are two points of AB and AC respectively, such that,

Let us assume that in ΔABC, the point F is an intersect on

Answered by sumit5910
7

Answer:

Prove that : DE||BC.

Given in ΔABC, D and E are two points of AB and AC respectively, such that,

DB

AD

=

EC

AE

______ (1)

Let us assume that in ΔABC, the point F is an intersect on the side AC. So, we can apply the

Thales theorem,

DB

AD

=

FC

AF

_______ (2)

Simplify (1) and (2)

EC

AE

=

FC

AF

adding 1 on both sides

EC

AE

+1=

FC

AF

+1

EC

AE+EC

=

FC

AF+FC

EC

AC

=

FC

AF

⇒AC=FC

From the above we can sat that the points E and F are coincide on AC, i.e., DF coincides with DE. Since DF is parallel to BC, DE is also parallel to BC.

∴ Hence, the converse of Basic proportionality Theorem is proved.

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